Measuring What Matters: Lucky Penny's Key Digital Marketing KPIs
- Ali Puglianini
- Mar 3
- 8 min read
Key Takeaways:
Cost Per Click (CPC) optimisation techniques have been shown to potentially reduce ad spend by 15-25% for similar traffic volumes [1].
Enhanced Click-Through Rate (CTR) strategies could increase engagement by up to 60% when properly implemented [2].
Focused conversion optimisation approaches may boost Sales/Leads metrics by approximately 30% [3].
Revenue tracking methodologies have been known to help identify opportunities that could increase marketing ROI by 25-40% [4].
ROAS optimisation strategies could improve ad spend efficiency by up to 35% [5].
Strategic impression and click measurement techniques may improve targeting accuracy by as much as 45% [6].
Understanding Digital Marketing KPIs: The Metrics That Drive Growth
In the fast-paced world of digital marketing, it's easy to get lost in a sea of data and acronyms. At Lucky Penny, we cut through the noise by focusing on a handful of key performance indicators (KPIs) that truly matter for growth.
Why hone in on these? Because understanding these KPIs can be the difference between a campaign that makes every click count and one that simply wastes budget. Yet many businesses struggle here; in fact, despite the importance of tracking KPIs, only 23% of marketers feel confident they're tracking the right ones [7].
This guide will break down Lucky Penny's preferred KPIs in plain English, with real-world examples and research-backed insights. Let's demystify these metrics and show how understanding them helps make smarter marketing decisions.

Cost Per Click (CPC): Every Penny Counts
Cost Per Click (CPC) is exactly what it sounds like: the amount you pay each time someone clicks on your online ad. Think of it like paying a small toll for each visitor who comes to your website through an ad.
Why is this metric important? Because it directly affects how far your budget can stretch. With a fixed budget, a lower CPC lets you buy more clicks (and thus more chances to convert customers), while a high CPC means each click is pricier, limiting your traffic.
Some competitive sectors have much higher CPCs than others. In those arenas, making every click count is vital (hence our name and ethos at Lucky Penny). A high CPC isn't necessarily bad if that click is likely to turn into a valuable customer, but it does raise the stakes.
Businesses need to keep an eye on CPC to ensure they're not overpaying for traffic. If your CPC is above industry benchmarks or eating up your budget too quickly, it's a sign you may need to refine your strategy, perhaps by improving your ad's relevance or quality or by targeting more specific, less competitive keywords.
On the flip side, an extremely low CPC might indicate broad, untargeted traffic that doesn't convert. The goal is a sweet spot: a CPC that allows for ample traffic without sacrificing quality. By monitoring CPC, you're effectively minding the cost side of your marketing equation, ensuring you get maximum value from each visitor.
Click-Through Rate (CTR): Gauging Ad Appeal
While CPC tells you about cost, Click-Through Rate (CTR) tells you about performance – specifically, how enticing your ads or content are to your audience. CTR is expressed as a percentage: it's the number of clicks divided by the number of times your ad was shown (impressions), multiplied by 100.
If your ad was shown 1,000 times and 50 people clicked it, your CTR is 5%. In real-world terms, imagine you hand out 100 flyers and 5 people visit your shop as a result – that's a 5% CTR.
This metric is a direct indicator of how relevant and compelling your marketing message is to your audience. A higher CTR means a larger portion of viewers felt your ad was worth clicking, which usually implies your message was on point. A low CTR can be a red flag that something isn't connecting – perhaps the ad copy is unclear, the imagery isn't attractive, or you're showing the ad to the wrong audience.
A "good" CTR varies by channel and industry. Search ads tend to have higher CTRs because they appear when people are actively looking for something, whereas display ads are shown more passively.
It's worth noting that platforms reward high CTRs; Google, for instance, often gives ads with higher-than-average CTRs a boost in ad rank or a lower CPC because those ads are seen as more relevant to users.
However, CTR isn't the be-all-end-all. An ad could have a sky-high CTR but still not convert into sales.
The key is to strive for a healthy CTR by matching your ads to the right audience and message, which is a core principle in our approach to digital marketing.
Sales and Leads: Conversions that Matter
Clicks and traffic are great, but most businesses want results, usually in the form of sales or leads. This KPI tracks the number of desired actions taken by users, whether it's a purchase on your website or a lead captured through a contact form.
Let's put this in context: imagine you own a local bakery and run an online ad promoting a catering service. Sales would be someone directly ordering catering online, and leads might be people submitting an inquiry form asking for more details. These are the actions that bring you closer to revenue.
Tracking this KPI is crucial because it directly measures marketing effectiveness in driving business growth. You could have tons of impressions and a healthy CTR, but if those clicks don't result in sales or leads, your marketing isn't delivering real value.
This KPI bridges marketing and broader business goals. According to a recent industry report, 79% of marketers have made lead generation a top priority [8].
Quality matters too. Ten high-quality leads are far more valuable than 100 unqualified ones who might never convert. Focusing on quality over quantity can significantly improve conversion rates and drive meaningful business growth.
In summary, Sales/Leads is the KPI that keeps your marketing honest – it answers the question, "Are our efforts actually driving business?" It's the clearest indicator of marketing success and one we obsess about at Lucky Penny because it directly ties to real business growth.
Revenue: The Bottom Line Boost
Where sales and leads count conversions, Revenue measures their monetary value. It's the amount of money your campaign has generated. This could be immediate sales revenue or projected revenue from leads.
Tracking revenue as a KPI means you're looking at marketing not just in terms of activity, but in terms of financial return – which is ultimately what every business cares about.
Why is tracking revenue critical? Because it closes the loop. It tells you precisely what you got back. A campaign generating many leads is good, but what if none convert to paying customers? That would show up as £0 revenue. Conversely, a campaign with fewer leads but all high-quality could show impressive revenue.
Research backs the importance of tying marketing to revenue. Companies that dig into their data often see significantly better results. For example, a Deloitte survey found that 49% of small businesses increased revenue by leveraging data analytics [9].
Tracking revenue helps resolve the classic marketing question: "What's the ROI?" By looking at revenue, you can determine which campaigns or channels are actually profitable. At Lucky Penny, we focus on revenue-driving metrics to ensure every campaign delivers measurable business results.
Return on Ad Spend (ROAS): Efficiency of Your Investment
If revenue tells you what you earned, Return on Ad Spend (ROAS) tells you how efficiently you earned it. ROAS is a ratio of revenue generated to advertising cost, usually expressed as a ratio (like 5:1) or a percentage (500%).
The calculation is straightforward: ROAS = Total Revenue from Ads ÷ Total Cost of Ads. If you spent £500 on an ad campaign and it brought in £2,000 in revenue, your ROAS is 4:1.
A high ROAS means you're getting a great return – the ads are profitable. A ROAS of 1:1 means you're breaking even, and below that means you're spending more than you're earning (which is usually unsustainable long-term).
ROAS is powerful because it encapsulates both cost management and revenue generation in one metric. It's also excellent for comparing campaigns of different sizes. A small test campaign with 3:1 ROAS is performing proportionally as well as a larger campaign with the same ratio.
At Lucky Penny, we love ROAS because it keeps us accountable. It's not just about driving big revenue numbers – if those came at a huge cost, the net gain might not be impressive. By focusing on ROAS, we ensure we're spending smartly, as detailed in our strategic success guide.
Impressions & Clicks: Building Awareness and Interest
The final piece of our KPI puzzle: Impressions and Clicks. An Impression counts each time your ad is displayed. A Click occurs when someone interacts with your ad.
Impressions tell us about reach – how many times our message is seen. Clicks tell us about initial interest – how many people were intrigued enough to act.
Think of impressions like people walking past a shop window, while clicks are people entering the shop. You generally need many impressions to yield a healthy number of clicks.
Impressions are crucial for building brand awareness. Even if someone doesn't click, seeing your brand is still a touchpoint. Marketing research often references the rule of seven – the idea that people need to see a brand several times before they act.
In digital marketing, we use impressions and clicks as early indicators when testing campaigns. If an ad isn't getting impressions, your budget might be too low or targeting too narrow. If it's getting impressions but no clicks, something's off with the creative or relevance.
Learn more about this in our article on digital marketing evolution.
Transform Your Digital Marketing Strategy Today
Navigating digital marketing metrics doesn't have to be complicated. Each KPI tells part of your marketing performance story. When you understand them, you gain a complete view of your marketing effectiveness.
By focusing on these core metrics, you ensure you're measuring what truly matters. At Lucky Penny, this focus on meaningful KPIs is baked into everything we do.
Don't let valuable opportunities slip away. If all of this feels overwhelming or you're curious about applying these insights to accelerate your growth, we're here to help. Contact us today to discover how Lucky Penny can help demystify your data and boost your marketing ROI.
Ciao for now!
Ali Puglianini
Frequently Asked Questions
Which digital marketing KPI shows the most promise for ROI? Research suggests that ROAS and revenue tracking are the most directly linked to ROI improvement, with optimised campaigns potentially delivering 25-40% better returns on marketing investment.
How can small businesses improve their CPC efficiency? Small businesses can enhance CPC efficiency by refining keyword targeting, improving ad relevance scores, and testing different ad formats—potentially reducing costs by 15-25% while maintaining quality traffic.
What's the relationship between CTR and ROAS? While a high CTR indicates engaging ads, it doesn't guarantee profitability. The best campaigns balance attention-grabbing content with conversion-focused messaging, leading to both strong CTR and ROAS.
How important is mobile optimisation for these KPIs? Mobile optimisation is critical, as over 60% of searches now occur on mobile devices. Properly optimised mobile experiences can improve CTR by up to 25% and conversion rates by approximately 20%.
Which KPI should new businesses focus on first? New businesses should initially focus on CPC and CTR to ensure efficient spending and audience engagement, then gradually shift focus to conversion metrics like Sales/Leads as campaign data accumulates.
