On the web, an interstitial webpage (or interstitial) is a web page displayed before or after an expected content page, often to display advertising or for regulatory reasons, such as to confirm the user's age (prior to showing age-restricted material) or obtain consent to store cookies.
Some people take issue with the use of such pages to present online advertising before allowing users to see the content they were trying to access.
According to a standard advanced by the IAB, an interstitial (also known as a between-the-page ad) can either be displayed on a separate webpage or appear briefly as an overlay on the destination page.
[2] Moreover, mobile advertising guidelines created by the Mobile Marketing Association (MMA) include in-app interstitial ads, which are integrated into applications.
[3] Many interstitial pages are circumvented by NoScript and ad blockers.