We use this expression to recommend something very highly, especially tourist sights or activities.
You can use this phrase in ………… language.
Spoken
Written
Informal
Example 1
A: Have you seen the Great Belt Suspension Bridge yet?
B: No, not yet.
A: Really? It’s a must. It’s really impressive.
Example 2
A: I’m wondering about visiting Ireland – what do you think?
B: It’s a must. You’ll love it.