How does the hollywood walk of fame decides who gets a star?

They just determine the actor or actress that has been in a lot of films, has a big fan base, and has been in great films to the extent where they are nominated or won an Oscar. A star also has to be around for at least 10-20 years in order to be honored. This is just from my own knowledge. You can always look it up too. I hope this helps though:)