What is bidding in Google AdWords?

Google Ads runs an auction every single time it has an ad space available – on a search result, or on a blog, news site, or some other page. Each auction decides which ads will show at that moment in that space. Your bid puts you in the auction.

For More Information Please Refer:
https://support.google.com/google-ads/answer/2459326?hl=en
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