How to correctly use keywords and discription tags

Title
Provide call to action.
Less than 80 characters
Use important keywords and phrases.
Describe what the page is about.

Keywords
Contains less than 250 characters.
Uses important keywords and phrases.
Minimal repetition of individual words.
Consistent with other content components.

Description
Provide call to action.
Use less than 250 characters.
Use important keywords and phrases.
Describe what the page is about.