The Mr. Potato Show is a very popular children's TV show in the Peppa Pig universe. It is all about being fit and healthy. A traditional episodes includes Mr. Potato, the star of the show, encouraging the audience to jump up and down with him and presenting fan mail to them.
There have also been other Mr. Potato shows where Mr. Potato appears with Mademoiselle Potato as either a detective or his normal self. It is unknown whether those shows are linked to this one.