A Page filter applied to a Google Analytics dashboard has the expected effect: it includes or excludes pages that match the specified criteria.
This is not a problem in itself, but it’s important to be aware that an advanced segment based on the same page value would not have the same effect.
For instance, an advanced segment based on “logged-in.php” would include all pages viewed during the same visit as logged-in.php, whereas a widget filter would include only that page itself.
Each of these two options has its advantages and disadvanges, but it’s important overall to remember that they have very different effects on your data display.
For a related post, see Use Advanced Segments Instead of Dashboard Widget Filters Based on Page.