are the minimum scores that an advertiser's ad must meet in order to be eligible to appear in a particular auction or ad placement. The Ad Rank threshold is a way for Google to ensure that only high-quality ads that are relevant to the user are shown in the top positions. The higher the Ad Rank threshold, the more competitive the auction and the more difficult it will be for an ad to appear in the top positions. There are no well-define factors that determine the ad-rank thersholds, but here are some factors you may consider (Ad relevance - Landing page experience - Historical performance of the ad and the advertiser - Ad format and targeting - Quality of the ad - Relevance of the ad to the search query - The context of the person's search - The person's search history - The device the person is using - The location and time of the search - The expected impact of assets (formerly extensions) and other ad formats - The competition - The relevance of the ad to the search query - Other relevance and performance factors)