The TF2 community store is a marketplace where those who play Team Fortress 2 can buy and sell virtual items. You can find many popular items available throughout the community store, as well as unique items that are hard to get in the game.
As for how you purchase items via the store, you can use funds from your Steam Wallet. If you already have a Steam account and familiar with the platform and the Steam Wallet, then you’ll have no problems figuring out how to buy and sell items. Even if you’ve never used the community store, it shouldn’t take you long to figure out how everything works.
With that said, if you want to buy affordable items to make playing Team Fortress 2 more fun, then head over to the community store to see what is currently on the market. Alternatively, if you have items you want to sell, then the community store is where you want to sell them at.