Fragen über die Beispielsätze mit, und die Definition und Benutzung von "Customization"

A: "go-to" is often an informal adjective to describe the person or thing you rely on in a situation.

For 20 years he was my go-to barber. meaning I relied on this person and really didn't even think of going anywhere else for a haircut.

in your sentence they've gotten even more casual by leaving out the noun that "go-to" describes. So they're using "go-to" as a noun itself. (The first documented use like this was in 1997)

I need a haircut, and Bob is my go-to guy for that.

I need a haircut, and Bob is my go-to for that.

A: Correct