(idiomatic, with bare infinitive, informal) Should; ought to; need to; must.
You had better finish that homework on time, if you want to get a good grade.
"Will we get it finished?" / "We had better."
The project had better get finished by the current deadline.
Wiktionary
Had-better Sentence Examples
You had better go.
But Carmen had better luck with Señor Medena.
No, I had better not think of him; not think of him but forget him, quite forget him for the present.
I told her that she had better not talk about it any more, but think.
These gifts are in high demand so if you want your loved one to be one of the lucky ones this holiday season, you had better start shopping for them soon!
