Hi,
Correct, there are three editions now. They need to update the text on this page to say "three" instead of "four" . There used to be Free, Basic, P1, and P2, but they retired Basic so only three SKUs remain. They forgot to update that first sentence to reflect the fact there is only three now.
Please note there is an add-on SKU to P1/P2 named "Governance", please reference below pricing page:
https://www.microsoft.com/en-us/security/business/microsoft-entra-pricing
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Thanks.
-TP