If a situation or event happens to someone or something, it has an effect on that person or thing:

as it happens/happened used when you say something that is surprising, or something connected with what somebody else has just said I agree with you, as it happens. As it happens, I have a spare set of keys in my office.

When something happens, it occurs or is done without being planned. Tell me what happened.

1. to take place; come to pass; occur. 2. to come to pass by chance; occur without apparent reason or design. 3. to have the fortune or lot (to do or be as specified); chance: I happened to see him on the street. 4. to befall, as to a person or thing: Don't worry; nothing happened to her.

happen (third-person singular simple present happens, present participle happening, simple past and past participle happened) (intransitive) To occur or take place.

Sip Happens is a wine boutique created purely from the joy that comes with sharing a bottle of something delicious with friends. The goal was to create a place where everyone, from the wine novice to the aficionado, could come together for new adventures in amazing, small-batch wines.

“Happens” is the correct spelling of the word. “Happens” is used with the third person singular for the verb “to happen”. This type of stuff happens from time to time.