Running a Pay-Per-Click (PPC) campaign is a great way to drive targeted traffic to your website, but how do you know if it’s actually worthwhile? Success in PPC isn’t just about clicks – it’s about understanding the key performance indicators (KPIs) that align with your business goals. In this guide, we’ll break down some essential metrics you need to track, and look at how to interpret them.
1. Click-Through Rate (CTR) – Are People Engaging With Your Ads?
What It Is: CTR measures how many people click on your ad after seeing it. It’s calculated as:
📊 CTR = (Clicks / Impressions) × 100
Why It Matters: A high CTR indicates that your ad is relevant and compelling to your audience. A low CTR may signal that your ad copy, keywords, or targeting need improvement.
🔹 Benchmark: A good CTR varies by industry, but in Google Search Ads, an average CTR is around 3-5%. Display ads tend to have a lower CTR (~0.5%-1%).
✅ How to Improve It:
- Use clear, action-driven ad copy.
- Include numbers, offers, or urgency triggers (e.g., “Limited Time Offer – 20% Off!”).
- Include terms the user searched for.
2. Conversion Rate – Are Clicks Turning Into Actions?
What It Is: Conversion rate tracks how many users take the desired action after clicking your ad. This could be a purchase, form submission, phone call, or any other goal.
📊 Conversion Rate = (Conversions / Clicks) × 100
Why It Matters: A high conversion rate means your landing page and offer are aligned with what users want. If your conversion rate is low, it could indicate issues with your website, landing page, or audience targeting. Equally if the conversion rate is very high that might indicate that what you are classing as a conversion isn’t very meaningful and should be reviewed.
🔹 Benchmark: The average conversion rate in PPC varies but is often between 2-5% for search ads. See our other blog for more details on what is a good PPC conversion rate.
✅ How to Improve It:
- Optimise your landing pages for speed and mobile-friendliness.
- Ensure a clear call-to-action (CTA) like “Get a Free Quote” or “Buy Now.”
- Use relevant landing pages instead of sending users to your homepage.
- Reduce landing page navigation & conversion options to keep the user focused on doing what you want them to.
3. Return on Ad Spend (ROAS) – Are You Making a Profit?
What It Is: ROAS measures how much revenue you generate for every pound spent on PPC ads.
📊 ROAS = Revenue from Ads / Ad Spend
Why It Matters: This is one of the most important metrics for determining whether your PPC campaign is profitable. A ROAS of 4.0 or 400% means you’re earning £4 revenue for every £1 spent.
🔹 Benchmark: A good ROAS depends on your industry, but 300% is often considered a solid starting point, being profitable for all but the tightest of margins.
✅ How to Improve It:
- Focus on high-converting keywords.
- Optimise your ad targeting to attract better-quality leads.
- Use retargeting ads to bring back users who didn’t convert the first time.
- Test & adjust bidding strategies
- Improve the website conversion rate
4. Impression Share – Are You Reaching Enough People?
What It Is: Impression Share is the percentage of times your ad appears compared to the total number of times it could have appeared.
📊 Impression Share = (Your Ad Impressions / Total Eligible Impressions) × 100
Why It Matters: A low impression share indicates you’re missing out on potential traffic due to budget constraints or low ad ranking. A high impression share means you’re close to exhausting the target phrases and may need to expand your campaign into new markets/phrases or expand the match types if you wish to grow.
It should also be considered that not all impressions are equal and not everyone searching is going to be interested in buying. The benchmark is different in every circumstance, making this a tough metric to understand, which is why it’s often not reported on.
✅ How to Improve It:
- Increase your bid or budget if you’re limited by funds.
- Improve your Ad Quality Score to rank higher without increasing costs.
- Adjust ad scheduling to focus on peak conversion times.
- Reduce target keywords if you can see wasted spend
- Create new ad groups with new keywords if you need to grow a campaign with a high impression share
5. Quality Score – Are Your Ads Relevant?
What It Is: Google assigns a Quality Score (1-10) to your ads based on relevance, expected CTR, and landing page experience.
Why It Matters: Higher Quality Scores lead to lower CPCs and better ad placements. With the ever increasing buzz around smart bidding, the industry has seen this metric quietly get less and less attention with it appearing in fewer exam questions over recent years. It’s suspected Google is looking to reduce visibility of this metric at some point, but it’s still important to understand it.
✅ How to Improve It:
- Write highly relevant ad copy that matches search intent.
- Improve landing page relevance by ensuring content aligns with the ad.
- Improve landing page load times.
- Improve landing page experience with good design and content flow, not too much, not too little, a clear call to action.
- Maintain a high CTR by testing different ad variations, keyword match types etc.
6. Cost Per Conversion (CPA) – Are Your leads Cost effective?
What It Is: CPA (Cost per acquisition, as CPC is already taken on cost per click).
📊 CPA = Advertising Cost / Number of conversions
Why It Matters: For businesses that are lead-focused rather than immediate sales and aren’t/can’t measure immediate returns, it’s good to know how much each lead is costing. This can then be measured against the % of leads that turn into sales and the average sale value in order to then work out an effective rough ROAS.
✅ How to Improve It:
- Test/Adjust bid strategies
- Improve website conversion rates
- Remove non-converting keywords from the account
- Test alternative ad copy
7. Customer Lifetime Value (CLV) – Are Your Customers Worth the Cost?
What It Is: CLV (or sometimes LTV) estimates the total revenue a customer will generate for your business over the course of their expected relationship duration with your business.
📊 CLV = (Average Purchase Value × Purchase Frequency) × Customer Lifespan
Why It Matters: If your PPC campaigns bring in customers with a high CLV, you can afford to spend more on acquiring them, and in terms afford a lower immediate ROAS, meaning you can bid more competitively.The biggest challenge is measuring it to begin with.
This typically needs to be done in-house as it requires extensive reviews of customer data but could be done via a bespoke business consultation.
✅ How to Improve It:
- Start by making sure you are measuring it as a business.
- Use remarketing to nurture long-term customer relationships.
- Focus on upselling and cross-selling to increase CLV.
- Offer loyalty programs or incentives to retain customers.
Final Thoughts: Define Success Based on Your Business Goals
There’s no single metric that defines PPC success – it all depends on what you want to achieve. If your goal is brand awareness, you might focus on CTR and Impression Share. If profitability is the priority, ROAS and Conversion Rate will be your key indicators.
📊 Tracking & Optimisation Tip: Always measure results using Google Ads reports, Google Analytics, and conversion tracking tools to make data-driven decisions.
Need Expert Help with Your PPC Campaigns?
If you’re unsure whether your PPC campaigns are truly successful or need help optimising performance, our team of experts can provide strategy, analysis, and hands-on management.
📞 Contact us today for a free PPC audit and let’s maximise your ad spend!
