So now we know the WHY of clear skin is important, now to the HOW to get clear skin:
RETINOIDS RETNIOIDS RETINOIDS
What are retinoids? They're a family of Vitamin A derivatives used to treat bad skin via increasing cell turnover.
What's cell turnover? Well, in a nutshell, your skin gets rid of old cells and replaces them with new ones on the regularly. You've probably heard about it before. For your skin, this happens about every 3-4 weeks.
So acne often starts when these dead skin cells aren't shed properly, and they mix with oil, forming plugs inside pores. When turnover increases, these dead cells are more likely to be shed rather than sticking around and fucking up your skin.
On top of that, hyperpigmentation and scarring tend to sit on the upper layers of your skin, so when you increase cell turnover, you'll end up shedding those bad boys too.
You might have heard about a purging phase when it comes to retinoids - this is true. Why so? Well, inside of your pores, acne starts off as this little clog known as a 'microcomedone'. It's a mix of dead skin n oil that hasn't reached the skin yet.
When you increase cell turnover, you basically end up bringing the material inside the pores towards the surface of your skin. You'd experience these breakouts anyway, but the products just made them come out sooner.
But since cell turnover is increased, even these pimples will be shed rather quickly. The purging phase improves after around 4-8 weeks of usage - so you have to stick through it if you want to see the gains.
However, you have to be CAREFUL. There is such a thing as overdoing it, and by doing so you can damage your skin barrier, which would lead to a lot of irritation and redness, increased oil production, more breakouts, and a bunch of other bullshit we don't want to deal with.