The ta form of a verb, followed by the phrase hō ga ii, is used to give advice. It corresponds to the English "had better do."
NOTE: The sentence-final particles ne and yo are frequently used when giving advice. either to soften a suggestion (as with ne in example 1) or to give force to it (as with yo in example 2).
Biru wa motto kanji o benkyō shita hō ga ii.
Bill had better study kanji harder, don't you think?
Furaito ni okurenai yō ni isoida hō ga ii desu yo.
You had better hurry so you won't be late for your flight.
Ima pasupōto o shinsei shite oita hō ga ii.
You had better apply for a passport now (in advance).
Hope this helps!
°˖ ✧◝(○ ヮ ○)◜✧˖ °こゆうきあいはら°˖ ✧◝(○ ヮ ○)◜✧˖ °