Dose anyone know what is the meaning of Alpha?

Leader, শীর্ষ dog, higher rank than anyone.
Its like a regular pack of wolves, except they can turn from human to wolf.

The leader, and to keep every thing in line

"alpha" means "a" in greek. the alpha is the leader of a group, generally an animal one.

It's the শিরোনাম the নেকড়ে give to the leader of their pack. He's the one who generally makes the decisions, and can enforce his will on the others with double timbre commands.

A Beta is what they call his সেকেন্ড in command/deputy.