A grace period is the time span between the moment you cancel your subscription and when it takes effect at the end of your billing cycle. Since you already paid for it, you will be able to use SerpWatch as usual within this period until your subscription ends.
After the grace period, you will need to renew your subscription in order for your tracking information to be updated. All the data gathered during the subscription and grace period will be available to you forever.
If you want to resume your plan during the grace period, you won’t be charged anything before the next billing cycle starts.
If you want to resume your plan after the grace period, you’ll need to choose the plan you want to continue with and your new billing cycle will start immediately.