Why do Barça players say visca Barça visca catalunya?

Could you elaborate on the cultural and historical significance behind the phrase "visca Barça visca catalunya" and why it's commonly heard from Barcelona FC players? It seems to be deeply ingrained in the club's identity, but I'm curious about the specific reasons behind its popularity and usage. Is it a rallying cry for Catalan independence? A show of solidarity with the Catalan people? Or simply a way for the players to express their love and devotion to the club and its fans? I'd appreciate any insights you could provide on this fascinating aspect of Barcelona FC's culture.