This is a test page. How many levels can a directory be into the website structure? A page of links is created and each one links to a unique page which is placed in a folder in a url. How many directory levels are going to be spidered? The amount of content on each page is important and each page must be unique.
Does it depend on the length of URL so you can have as many levels as will fit in a certain URL length
examples: 1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18
or level1/level2/level3/level4/level5/level6/level6/
I don't think it should matter. For all intents and purposes you can have as many as required.