Hello,
Thank you for reaching out to us with your question about Rank Math PRO.
With Rank Math PRO, a single membership is valid for all your personal websites. This means that if you purchase Rank Math PRO for one site, you can use it on other personal sites without the need to buy additional licenses.
If you are an agency and wish to use Rank Math on your clients’ websites, you can consider the Business and Agency plans, which offer additional features and support for your clients.
If you have any more questions or need further assistance, feel free to ask.
Sources:
Why Rank Math Is Better Than Yoast » Rank Math
Installing Rank Math on a Multisite Environment » Rank Math
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