You’re using target search page location bidding. You know it’s working because you see your ad:
on the first page of Google search results or in the top positions
repeatedly mixed in with the organic search results
on the second page of Google search results or in the second positions
at the bottom of the every page of search results
“Target search page location” is a type of flexible bid strategy that automates bidding across multiple campaigns, ad groups, and keywords to show your ad on the top of the page or on the first page of Google search results. The “target search page location” bid strategy doesn’t guarantee placement on the first page, or ad position on the first page of search results. These estimates and the bid strategy will typically attempt to achieve your target location, but final placement is ultimately determined by the outcome of the ad auction, which is influenced by advertiser competition and Quality Score.
Read more here: https://support.google.com/adwords/answer/6268611?hl=en