Google Ads: Important Metrics to Monitor | GlowMetrics

Jul 21st 2021

Digital Marketing Insights

5 min read

Posted by Nicola Russell

Google Ads: Important Metrics to Monitor

You've launched your Google Ads campaign and after a few weeks, you're super excited to dive in and start optimising your campaign. You log into Google Ads...and you don't even...

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You’ve launched your Google Ads campaign and after a few weeks, you’re super excited to dive in and start optimising your campaign. You log into Google Ads…and you don’t even know where to begin. You’re immediately overwhelmed by all the metrics. Unlike other more traditional advertising channels, PPC marketing allows you to track nearly every aspect of your campaigns. From how many impressions and clicks your ads receive, to the click-through rate and cost per click. But it can be overwhelming. In this blog, we’ll look at 4 key metrics you should monitor when optimising your PPC campaigns.

These aren’t the only metrics you’ll want to look at, but they’re fundamental to well-run PPC campaigns and a great jumping-off point to optimise your Google Ads account.  1. Return on Ad Spend (ROAS) Basically, this metric measures how much money you are getting back from your ad spend. When your boss asks, “how are the ads doing?” – this is the go-to metric. ROAS is defined as Revenue/Cost but in Google Ads, it is actually called Conv. value/cost (as seen in the Google Ads screenshot below).

In the below example, Campaign 1 achieved a ROAS of 18.78 which means that it generated revenue 18.78 times the cost, whereas Campaign 2 has a lower, but very healthy, ROAS of 4.34.

Google Ads ROAS

Campaign 1 has a Target ROAS set to 970% (9.70 – because strangely enough ROAS is expressed as a number in the report but as a percentage when using in smart bid strategies) and a ROAS figure of 18.70.  Although that is a high ROAS figure, it is ever so slightly below our target ROAS for that campaign. In contrast, the other campaigns are all out-performing their Target ROAS figures.  ROAS can be confusing for new account managers but just remember, a ROAS figure below 1 means that you are spending more money than the revenue you are bringing in, those campaigns may need some optimisation or may even need to be paused.

At the same time, a very high ROAS might mean that you are not taking full advantage of the success of a campaign. It means that your daily budget is too low and it is constraining performance. Therefore, you would want to increase the campaign budget in order to maximise revenue and ROAS. 2. Cost Per Conversion All businesses should be tracking conversions, and these conversions are different for each business. These may be sales, subscriptions, email signs ups or form submissions – it’s whatever is most important to your business. The cost per conversion metrics tells you how much you’re paying for that desired action.

The formula for Cost Per Conversion is: Cost Per Conversion = Total Cost of Generating Traffic / Total Number of Conversions. For example, an ad campaign costs €50 for 50 clicks, and from those clicks, 5 conversions were generated. The Cost Per Conversion = €50 / 5 conversions, resulting in €10 per conversion. It’s up to you to decide, based on your own industry and niche, if this represents value for money for your business. if you’re selling reading glasses for €12, it’s probably not.

However, if you’re selling luxury suitcases at €200 then that is a much better cost/conversion metric.  3. Conversion Rate Conversion rate shows how often an ad click or other interaction leads to a conversion. It is calculated by dividing total conversions by the total clicks. A low conversion rate could point to potential problems within the conversion funnel. This means anything from the landing page such as page speed, pricing, tone of content, or even the colour of a button, can affect the conversion rate. Fixing these problems and increasing the conversion rate is a constant battle. We recommend A/B testing your landing pages using tools such as Google Optimize.

Google Ads Conversion Rate

Another tip is to check your search terms report to see the actual terms that are driving impressions and clicks. You will more than likely find that lots of irrelevant terms are showing your ads and driving irrelevant traffic to your site – users who won’t convert. Make sure you’re going after the right audience and utilising negative keywords to keep irrelevant clicks from getting through.

Search Terms Report








Bear in mind, that one thing the conversion rate doesn’t tell you is the quality of conversions. Therefore, it’s always worth getting feedback from your sales team regarding the quality of conversions your ads are driving.  4. Clickthrough Rate (CTR) The clickthrough rate tells you how many people have seen your ad and clicked on it, and is defined as the number of ad clicks divided by the number of ad impressions. For example, if 1,000 people saw your ad and 23 people clicked on it, then the click-through rate would be 2.3%. However, it isn’t just a case of trying to get the highest possible CTR.

Inevitably your ads will show for irrelevant terms (that’s why we also recommend checking your search terms report as we mentioned above) so it’s important to use your ad copy to weed out unqualified clicks – and this may lower your click-through rate, which might be a good thing. Measuring the click-through rate of an ad is also a great way to determine how effective an ad is. A low CTR may indicate the ad isn’t relevant or compelling enough to users, and that it may be time to make some edits. Check out WordStream for some benchmarking data on CTR. It’s also worth checking out what ads your competitors are running to see how they are encouraging clicks (are they running free trials or demos? Maybe you need to do the same?) The click-through rate is also important because it influences how much you pay per click on average.

On the Google Ads network, the click-through rate has a direct influence on an advertiser’s quality score and ad rank. The less you pay on average per click, the further your daily budget will stretch! So it’s always important to try to have a solid CTR in your account.

How Do We Monitor These Metrics?

As advertisers we spend a lot of time in the Google Ads interface monitoring the performance of our campaigns, however, this is not always the best solution for relating campaign performance back to our clients. That’s why we use Google Data Studio. We typically use this Google tool to create fully customised and streamlined reports which automatically update our client’s Google Ads data in real-time. A game-changer for our clients to see exactly how their accounts are performing. 
Data Studio
So there you have it! Some metrics to focus on as your start to optimise your Google Ads campaigns. The temptation may be to focus on clicks, impressions and cost/click (and other vanity metrics) but one of Google Ads’ greatest strengths is the amount of data at your fingertips. So dive in and check out these metrics in your account. 

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One response to “Google Ads: Important Metrics to Monitor”

  1. Charlie austin says:

    Brilliant insights shared in this article! ???? As someone who’s delved into the world of Google Ads, I can’t stress enough how crucial it is to comprehend these metrics. This post decodes the complexity and presents these metrics in such a clear manner.

    Impressions, CTR, Quality Score – these aren’t just buzzwords, but vital indicators of ad performance. And the breakdown of conversion metrics? Priceless! It’s all about understanding where your investment is paying off.

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Posted by
Nicola Russell

Nicola is the Digital Team Lead at GlowMetrics, preparing and executing PPC & SEO strategies for new and existing clients. Nicola specialises in integrated marketing campaigns, combining the best of paid social and paid search to get the finest of results for her clients
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