Don’t be confused! Contour takes some extra patience when blending. It looks very scary for a long time but once you get it, it’s like magic! The type of blending you need to do depends on what kind of contouring product you use.
If you’re using cream products to contour, I recommend trying a damp Beauty Blender or a similar type of sponge, like the Real Techniques one. If you don’t have access to a sponge, you need a small, dense buffing brush. Small stippling brushes, like the one from ELF, work great too! If you’re using powder products to contour, you’ll definitely need a dense round buffing brush or small flat topped brush.
There are tons of tutorials out there that show a crazy method of applying tons of highlight and contour all at once, and then blending those together at the same time. I don’t like to do that - I prefer to do my contour first, because then I can clean up and soften my contour with the highlight products I’m using. Always blend your contour upwards, towards the tops of your cheeks, instead of down towards your jaw. This will lift the cheekbone. Also, don’t bring your contour in farther than where your eye would begin unless you have a very wide face; in that case, bring it inwards only to where the center of your eye would be (draw an invisible line down your face from that point). If your contour gets to crazy, I clean up underneath with my highlight or some concealer or foundation.