Concealer is a powerful makeup product that helps to cover up the look of skin imperfections, such as dark spots and blemishes. Certain formulas also work to brighten dark circles under eyes. Concealer is considered a color-correcting makeup product that is a bit thicker than foundation, and is used for targeted application as opposed to all-over coverage.
Foundation is just that—the foundation for all other cosmetics, including your concealer. For best results, apply concealer after applying and blending your foundation or CC+ Cream.
When it comes to applying concealer, less is definitely more. Concealer is a buildable product, so you want to start with a very small amount applied to your favorite concealer brush, and then gently dab it over the area until you achieve your desired amount of coverage.