Before you can use the Gas you generate, you will have to claim it; the exact process for doing so depends on which wallet you are using. You can claim your Gas at any time.
What does it mean? Can you please explain how this works with WEB wallets
Sorry, I haven't tried the web wallet options yet. I've been continuing to use the old ANS wallet until the new options have been in use for a while. Claiming will likely involve either sending your ANS to yourself, or simply clicking 'claim'. Can someone with experience with the web wallet please answer this?