I want to make sure everyone is using it and in the right way. First off, you have to pick a concealer that's right for you and how much coverage you need.
Yellow concealers also known as Apricot in color, used to conceal bluish bruises, under-eye circles and mild red tones on the face.
Lavender concealers used to normalize yellow-colored skin imperfections such as sallow complexions and yellow bruises. It can also help conceal very dark under-eye circles and dark spots on bronze skin tones, thanks to Aline Franco for showing me this trick!
Green concealers used to neutralize red tones on the skin. Use this for covering blemishes, zits, red blotches, rosacea, and port-wine stains
When using concealers tap it (not rub) underneath your eyes from the inner corner to the outer corner. Next put your foundation on, go over the concealer a little bit to hide it and even your skin tone. You may also use a foundation a bit lighter under your eyes to brighten them up as well. Also, remember to layer instead of putting on a thick layer, which will cause creases. Always set your concealer in with translucent powder for a long lasting crease-less look.
Full Coverage - This gives you the "flawless" face; but you have to make sure you use the right product and the right amount. Too much or too thick will make you look cakey. This is for someone who has a lot of breakouts, pigmentation, or just a very uneven skin tone. Layer it instead of putting on a thick layer. Your tool would be a foundation brush or Beauty Blender.
Medium Coverage - It has more coverage than the sheer but not as much as the full. This is for anyone who wants some coverage. I would suggest using a concealer to cover spots if you have any. Your tool would be a foundation brush or Beauty Blender.
Sheer Coverage - This would be for someone who doesn't need much concealing, but still wants to even out the skin tone. Your skin will still look like skin. Your tool would be a foundation brush or Beauty Blender.
Powder - This would be best for oily skin as it contains no moisture in it. They are usually very matte unless it is a mineral powder (which tend to have shine). Usually, powder is easier for people to use everyday and on the go. Your tool for this would be a powder sponge or a dense buffing brush.
Tinted Moisturizer - This is basically a moisturizer with a tint of color. This would either be for everyday wear just to neutralize the skin a bit, or someone who shows no flaws. Your tool for this would be fingers.
I always put on a hydrator first to help the foundation slip better; but make sure you wait a few minutes for the moisture to set in your skin. Put the foundation on with downward strokes to help minimize the look of pores and you don't want your fine hairs to stick out because that wouldn't be sexy!!!