Actually it is main step of overall makeup if your foundation is not good you doesnt look good so its better to give an attention to choosing your foundation.For choosing your foundation you better need to know your skin texture and also your skin tone.if you have oily skin its better to buy mousse foundation or you can buy stick foundation if you have combination skin then you can buy liquid foundation or any type of foundation but f you have dry skin then definetly you need to buy creamy foundation.
Then for choosing shade of foundation its better to know either your complexion is cool under tone or warm under tone because if you are cool under tone then there is range of shades for cool under tone and its better to choose your foundation shade amoung those.