Cost per click is an amount actually paid for a click on a particular ad.
The cost per click shows how much you pay when your ad is clicked. CPC is used to assess the cost-effectiveness of an ad campaign.
CPC = Ad costs / Number of clicks
Google Ads shows you this information while calculating the CPC on auctions for your keywords. You can integrate your Google Ads with Google Analytics natively.
Analyze the effectiveness of different advertising channels by comparing clicks, impressions, cost, CTR, CPC, and ROAS. To harvest all necessary data for this analysis you can use cost data import by OWOX BI Pipeline.