〜ほうがいい hou ga ii
〜ほうがいい（hou ga ii）means “had better ...; it's better to ...”. Used to give advice or a recommendation. Formation: V（た形）＋ ほうがいい ／ V（ない形）＋ ほうがいい
had better ...; it's better to ...
N4Formation
V（た形）＋ ほうがいい ／ V（ない形）＋ ほうがいい
Explanation
Used to give advice or a recommendation. For positive advice the past (た) form is typically used; for telling someone not to do something, the ない form is used.
Examples
Note
Affirmative advice strongly prefers the た form (ねたほうがいい). Compare 〜たらどうですか, a gentler suggestion.
FAQ
〜ほうがいい — what does it mean and how is it used?
had better ...; it's better to .... Used to give advice or a recommendation. For positive advice the past (た) form is typically used; for telling someone not to do something, the ない form is used.
〜ほうがいい — how do you form it?
V（た形）＋ ほうがいい ／ V（ない形）＋ ほうがいい
〜ほうがいい — any usage notes?
Affirmative advice strongly prefers the た form (ねたほうがいい). Compare 〜たらどうですか, a gentler suggestion.