Why do some native Japanese speakers put a comma after a particle? [duplicate]

Question

Example:

あなたは、きっと日本の抹茶ティーは嫌いだね

This is how I'm seeing the sentence:

You'll, certainly hate Matcha tea in Japan.

Or maybe I'm translating the sentence in the wrong way? Anyhow, could be the reason of putting that comma there?