The Brief: "Issa vibe" is a stylization of the phrase "it's a vibe."

DEEP DIVE
Issa vibe can mean that something is relatable, a big mood, or a shmood. It can be used as a synonym for it me. Issa vibe can also be a way to say that a song is good, that it’s a bop. More generally, the phrase can mean that something is good overall.
4 AM by 2 chainz and Travy will always be in my top 5 hip-hop songs. Issa major vibe.
β Tyler Cameron (@TylerJCameron3) July 23, 2019
issa mood issa vibe issa look issa match π pic.twitter.com/2PvBVNRNQt
β eliza β‘ is maybe meeting ari in 135 days? (@needyeliza) July 22, 2019