Kuta Beach is a busy spot for especially young tourists: weather is often nice, cheap places to eat and a lot of pubs, bars and clubs.
Because of its popularity, there are also some downsides to that place: taxi-drivers can be aggresive, a lot of trafficjams, pickpockets are active night and day and a lot of salesmen on the streets. However, if you can live with these downsides, you could have a really good time in Kuta Beach.
TIP: don’t go to Kuta for the beach or surfing. Garbage is everywhere: on the beach and in the sea. (Surfing between the dirt.)