Here's why:
* Gustar is an irregular verb that means "to like" or "to be pleasing."
* Me is the indirect object pronoun for "yo" (I).
* In Spanish, when using gustar, the object of the verb (the thing you like) is the direct object, and the person who likes it is the indirect object.
So, the full sentence structure would be: "Me gusta [something you like]."
For example:
* Me gusta el helado. (I like ice cream.)
* Me gusta la música. (I like music.)
* Me gusta leer. (I like to read.)