The 18-year-old forward has opted to head for Scotland during the winter transfer window after seeing his path to first-team football in France blocked by a star-studded array of attacking talent.
Brazil international Neymar is one of several proven performers on the books at Parc des Princes, with the likes of Kylian Mbappe, Edinson Cavani, Angel di Maria and Julian Draxler forming part of the supporting cast.
Weah has seen game time and recorded his first senior goals for PSG amid that fierce competition for places, but the United States international needs more minutes in order to further his development.
Celtic are prepared to offer them to him in their ongoing efforts to assert domestic dominance again this season, with a highly-rated talent having been welcomed onto their books.
Neymar believes Weah will flourish at Parkhead, with the South American superstar telling the Daily Record: “It is a very exciting move for him from what I have seen of his talent he has everything to go and be one of the top attacking players in Europe.
“It is a good move for him, a good move for Celtic as they are getting such a big talent, and also a good move for PSG because he has a chance to get experience and games and come back to us a more complete player.
“He did have options - but he chose the right one. Celtic are a big club, in their league they attack a lot and score a lot of goals, and also they are still in Europe - so they offer him much.”
Weah, who is considered to be one for the future at PSG, penned a one-year contract extension with the Ligue 1 giants before linking up with Celtic.
He is now tied to his parent club until 2021 and will be determined to prove himself worthy of a starting berth once he returns to the French capital.
For now, though, the youngster has linked up with a side sat top of the Scottish Premiership table.
Only goal difference has Celtic perched above Old Firm rivals Rangers at present, but they do have a game in hand.
Brendan Rodgers’ side have also made it through to the last 32 of the Europa League where they are due to face La Liga heavyweights Valencia.