There are two paths ahead of the 25-year-old: one leads to him becoming the latest attacking maverick to steal the hearts of West Ham's supporters, and the other results in him being yet another creative player whose career has stalled at the London Stadium.
The Irons are now working to reach an agreement with Brentford over a new deal for Benrahma that would see the player join them on an initial loan deal.
There has been a lot of speculation surrounding his future with a number of Premier League clubs monitoring him but it appeared as though West Ham had won the race.
West Ham United has captured Algerian winger Said Benrahma on a season-long loan from Championship (second-tier) side Brentford with an agreement to make the transfer permanent, the Premier League club said on Friday.
The Bees signed Benrahma from French club Nice for less than £3m two years ago. It included and still includes good players.
"I spoke to the manager, so I know exactly what he expects from me", Benrahma said upon his arrival. I'll try to meet his expectations on the pitch because he's put faith in me and hopefully I can give it back on the pitch.
Benrahma scored 17 goals in 46 appearances for Brentford last season as they reached the Championship play-off final - suffering a 2-1 defeat to Fulham at Wembley.
Having been priced out of a move for Burnley centre-half James Tarkowski, David Moyes instead brought in experienced Premier League operator Craig Dawson on loan from Watford.
The Algeria worldwide began his career in France with Ligue 1 side Nice and made 18 appearances for the first team before moving to Brentford in July 2018.