Unless you’re using the Unlimited license which allows you to activate the license on as many websites you need, you will have a limit towards the total number of license activations, 1 for the Single, and 3 for the Plus.
To make things easier for you when you’re using the plugin on staging/local/dev WordPress installs, the system doesn’t count the activations for these environments, so you’re able to activate the license update the plugin within the Dashboard whenever a new version is available without any problems. This is done based on specific patterns related to the domain and subdomain names.
The following patterns are used to prevent any counting: localhost, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, *.dev, .*local, dev.*, staging.*, development.*
In addition, there are hosting companies that allow customers to create their own staging environments and the domain name can be the one of the hosting service, including: