[1] The album features guest appearances from Young Thug, Future, GloRilla, Rylo Rodriguez, Rod Wave, Travis Scott, and 21 Savage.

Upon the release of WHAM, Baby appeared in a cover story interview with Complex in which he spoke about the creation of the album.

Baby described the record as his "young nigga street shit", stating that the goal for the album was to prove those who doubted him wrong.

[13] On December 31, Baby shared the album's official trailer before releasing a live performance of "Streets Colder" on the 4 Shooters Only YouTube channel on January 1, 2025.

[16] On January 6, 2024, Baby released a music video for the album's sixth track: "By Myself", which features Rod Wave and Rylo Rodriguez.

[17] On January 7, Lil Baby performed the song "I Promise" on The Tonight Show,[18] and released a deluxe version of WHAM.

The deluxe version, which features four new tracks, was made available for purchase on the Motown website,[19] before being released to streaming services on January 10.

[25] In a negative review, an AllMusic writer called Lil Baby's flows and beat selection "laughably generic", and said that the guest appearances failed to "save WHAM from mediocrity".

[23] In a positive review, Clash's Robin Murray wrote that the record "distils Lil Baby’s potency down to a thick, unrelenting elixir".