URL structure5 rules onhow your page addresses are put together.

Case, length, separators, parameters and session tokens in the addresses you link to.

Address form

Addresses are very longAn internal address is longer than the set number of characters.In the report: Internal URLs exceed the configured length limit
Addresses carry many query parametersAn internal address has at least the set number of query parameters.In the report: Internal URLs carry many query parameters
Internal URL paths contain uppercase lettersAn internal URL path contains one or more uppercase letters.In the report: Internal URL paths contain uppercase characters
Internal URL paths join words with underscoresAn internal linked path has an underscore between letters, unless any path segment is an excluded API name or that same segment contains a digit or dot.In the report: Internal URLs use underscores as word separators

Links and resources

A link points to a place missing from the page's HTMLAn internal link's #fragment matches no id or <a name> in the target page's captured HTML.In the report: Internal link fragments absent from captured target HTML