Gustar is a regular verb but operates differently to other regular verbs.
We understand it as meaning ‘to like’, for example: Me gusta el fútbol = I like football.
It doesn’t however, instead it means ‘to appeal/please’. So, ‘me gusta el fútbol’ translates literally as‘football pleases me’.
Remember that when we want to decide ‘who‘ is liking something we use one of:
me
te
le
nos
os
les
And we decide between Gusta and Gustan depending on ‘what’ is being liked:
Me gusta el fútbol – I like football (1 thing)
Me gusta jugar al fútbol – I like to play football (1 verb)
Me gusta jugar y ver el fútbol – I like to play and watch football (2 verbs)
BUT
Me gustan el fútbol y el rugby – I like football and rugby (More than 1 thing)
Me gustan los deportes – I like sports (More than 1 thing – a plural)
The following links will explain it in more detail and will show you other verbs that work exactly the same way:
An excellent explanation of the verb with a list of similar verbs at the bottom and a practice quiz on the left.
Another good review and practice quiz from Spanishdict.com
Review of the two parts of using Gustar with exercises
More verbs like Gustar