Overlays are another ad units being introduced with Pokkt SDK v6.0. These are
rich media contents that can be displayed over any video ads. These overlays
can contain additional information about the ad being displayed.
example, a few lines on the product, a button to open some link related to
the product being advertised etc. Since these overlays can display rich
media, an advertiser can use this to put interactive content, the
possibilities are huge here.