UV, haze, and skylight filters are useful for protecting the lens.
Because lenses already have UV filters inside, UV filters don't block any more UV light than what is already blocked by the lens.
Haze and skylight filters may have a light pink tint for removing the blue color of the atmosphere.
Be sure to remove the clear filter when using another filter.
If you don't, the filters may block the light, darkening the corners of your photographs.
Some will chide you for having a $20 filter on your $200 lens.
They'll rant about how the quality of your lens is being degraded by the filter.