A private 1:1 Korean daily class a short walk from Haeundae Beach
The Haeundae stop is a private one-to-one Korean daily makeup class at RihaKim Makeup, a short walk from the beach.
The class
It is private and one to one. The subject is Korean daily makeup, the everyday face rather than a one-night look. You book it as a class, and the teaching happens on your face.
Where it sits relative to the beach
The card places the studio a short walk from Haeundae Beach. The location section is more exact: the beach is a 10–15 minute walk. You do the class, then you are back near the water, or you come from the water and then do the class.
What “must-visit stop” is doing in the sentence
The card is asking you to put the class on a Haeundae day, next to the beach you are already going to. It is a stop in that neighborhood. It is not a claim that the studio outranks the rest of Korea.