The content presents a tutorial on how to modify the size of an ImageView by setting its layout parameters to match the parent. This method toggles the size between the match_parent and the initial size set by the user. The lesson uses Constraint Layout as an example but can be applied to other layouts like Frame Layout, Relative Layout, etc. The provided source code is written in the Java programming language and is used in context with Android’s AppCompatActivity. The code demonstration is accessible via a video link, with additional support available through a contact link and email.