pageType variable is a flag used to designate error pages on your site, such as 404 errors. If this variable contains the string
errorPage, it populates the ‘Pages Not Found’ dimension.
Do not set this variable on non-error pages.
There is not a dedicated field in the Data Collection UI to use this variable. Use the custom code editor, following AppMeasurement syntax.
s.pageType variable is a string where the value
errorPage is its only valid value. Set this variable to this value on any error page on your site, such as on 404 pages.
s.pageType = "errorPage";
Use an eVar to collect the error code so you can get more information on what specific errors visitors encounter on your site.