The depth of the page in a Visit to which customers to your site browse. Let's say a customer views Page A, B and then C in a single visit. Pages A, B, and C have a hit depth of 1, 2, and 3, respectively.
Suppose, in a visit, you visited 9 pages : A -> B -> C -> D -> E -> F -> G -> A -> D - visit ends.
The Hit Depth (not to be confused with the Visit Depth) would be as follows for these pages:
So, Hit Depth shows the depth of the corresponding hit; it will increment gradually until the visit ends.