The club confirmed the signing on its official website on Thursday.
This will be a reunion for the player and the club. Flamini played for Arsenal from 2004 to 2008 before joining AC Milan. After his contract ran out, he was able to sign with the Gunners.
Flamini had eight goals and 11 assists during his first stint with the club. He doesn't bring much to the offense, but he will add to the team's depth at midfield and can help the team on defense from there.
Anything he adds to the offense is a bonus because he is a defensive midfielder. He will be able to play the middle of the field and slow up the opponent's attack.
Many fans will see it as a minor move. The veteran will be good for depth, but he won't be a star player. He was a free transfer, which makes the move understandable. However, fans want Wenger to be aggressive and spend money to get a premier player.
Although the Gunners needed help at midfield, Flamini probably wasn't the solution that many fans were targeting.
Fans will be split on this signing. Yes, it's a nice and cheap signing. He was a fan favourite during his time with Arsenal.
Nobody expects Flamini to come in and be a big-time player. He was brought in to add depth and help the team on defense. He can play multiple positions, so his versatility will help him get playing time.
On the other side, there are better options that Wenger could've gone after. Marouane Fellaini and Mesut Oezil are a couple of players who would've been bigger signings, but those would have been tougher to pull off. Arsenal would have had to convince both the player and the club to agree to a deal.
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And yes, those moves would have required Wenger to spend more money.
No matter what each fan thinks, this signing is a promising move. It shows that Wenger is exploring different options in order to improve the squad.
The Gunners needed help immediately. Injuries are starting to pile up. Lukas Podolski, Jack Wilshere and Aaron Ramsey are all banged up. Podolski could miss up to 10 weeks, according to Ben Curtis of the Mirror. Mikel Arteta and Thomas Vermaelen are still out with injuries.
With so many injuries, Wenger needed to add depth. The Gunners couldn't afford to stand still any longer, and the boss made a good signing.
Flamini isn't going to be the big acquisition fans wanted, but he represents a sign of things to come.