That's a good question. Let me put it this way.

You control your inputs in business and by controlling the inputs you can manipulate the outcome.

You control how much value you can offer to people, how often you post social media content, or how well you adapt just to give you a few examples.

Let's say you post on social media 1 time/day, you're not going to reach as many people as you should to grow your business. But if you post 5 times/day, you're going to reach a much larger audience. You essentially 5x your output by posting 5 times/day and that manipulates your chances of getting new client's or customers.

You control how many hours a day you would like to work, the more you work, the better your results will be.

Now for the advertisement, you control who gets to see it, how many people get to see it, what your message is, and draw their attention. Let's say it doesn't reach the right audience or you didn't draw their attention, you can collect that feedback and make changes to the audience or the message so the right people can see it and it draws attention.