Are generated passwords stored or sent anywhere?
No — they are generated on the server per request and never logged or stored.
What do the strength labels mean?
Entropy-based: Very Weak (<40 bits) up to Very Strong (128+ bits). Aim for Strong or better.
What does "exclude similar" do?
Removes look-alikes like 0/O, 1/l/I so passwords are easier to read and retype.