You can think of Tokens as a form of currency in Flow. Each completed Flow will remove a Token from your account.
You can check your Token bank in the 'My Account' settings.
All Free users have 15 Tokens to use within one calendar month. Tokens will reset at the beginning of each month and do not rollover. Once you run out of Tokens, you can no longer run Flows. The option to purchase more Tokens and upgrade your account is coming soon!
Want to earn more Tokens? Refer a friend in the Flow extension to earn 10 additional Tokens for the month!