Amount of Bids
Bid amount means what is the minimum that you can use for making a bid for a specific position. For example, you can’t bid for 20cents on an ad which costs $3 for ranking it first. According to the system, your bids must be higher for getting the higher ranks in Google AdWords management system. The more important factors for your bidding areas
Quality of your ad: Relevant landing page experience and CTR are the essential things for the ranking of your ads.
Search Context: your device, different terms and time of the day also have a strong impact in raking.