This business name was inspired by the word "play". Information about playing games and competitive sports are ever popular and highly searched.
AllAboutPlaying.com is a .com domain. Dot com domains are the most desirable top-level-domain in the world, famously used by websites like youtube.com. Once secured, a .com all but guarantees no-one else can outrank you for your own name in the long run.
Game or Sports Equipment brand
Content or Membership website
App / service