What's a primer and what are the best ones...

A primer is a liquid or gel that is placed onto the skin prior to makeup application. It tends to fill in any lines, wrinkles, and gives the appearance of clear and even skin.

Primer should be a stable in every woman's purse to achieve that flawless makeup application look.

Some of the best primers tend to be the most expensive such as Smashbox's primer which runs around $30.

Fortunately there are other options such as Revlon's Age Defying instant firming face primer with botafirm and Sally Hansens Airbrush Primer with retinol in clear (for all skintones) both under $10.00.

These primers are to be put onto the face using a foundation brush for the best application.