Conversation so far:
Exactly what is meant by the Spice Girls' Girl power?
The Girl Power is a message of empowerment appealed to young girls, adolescents and adult women, and it emphasized the importance of strong and loyal friendship among females.
What mixed reactions did the Spice Girls' Girl Power slogan have?
Some critics dismissed Spice Girls' Girl Power as no more than a shallow marketing tactic, while others took issue with the emphasis on physical appearance.
What else happened following critic's reaction of Spice Girls' Girl Power besides dismissing it as a marketing tactic?
Some commentators credit the Spice Girls with reinvigorating mainstream feminism—popularised as girl power—in the 1990s.
Were there a lot of controversy going on about feminism at the time when Spice Girls new mantra Girl Power came out?
Spice Girls' Girl Power was by no means original in the pop world: both Madonna and Bananarama had employed similar outlooks.
Did the Spice Girls go on to be successful regarding their girl power?
The Spice Girls' debut single Wannabe has been hailed as an iconic girl power anthem.
Did the Spice Girls have a huge following?
The Spice Girls remained the biggest-selling pop group of both 1997 and 1998.

Question: What are some important aspects?
Self-contained rewrite: What are some important aspects about the Spice Girls following?