Click Depth
Click depth is the number of clicks it takes to get from the home page, or an entrance page, to a destination page on a website. The more clicks it takes, the less likely Google will crawl the page or it will rank.
Pages that are the closest to the homepage are considered to be the most authoritative and the most likely to be crawled and indexed by Google.
Click depth is important for pages to be crawled efficiently and for the flow of link equity; therefore does influence ranking indirectly.