Installing plug-ins for After Effects - Adobe Inc.
helpx.adobe.com › after-effects › usingMay 18, 2020 · Plug-ins. Plug-ins are small software modules—with filename extensions such as .aex, .pbk, .pbg, and .8bi—that add functionality to an application. Effects in After Effects are implemented as plug-ins, as are some features for importing and working with certain file formats. The Photoshop Camera Raw plug-in, for example, provides After Effects with its ability to work with Camera Raw files.