When you have the correct structure, information and landing pages and call-to-action you can start promoting your website using advertising. This will massively increase the number of people who see your website and it means that your marketing has to work otherwise you'll be spending a lot of money and not getting a return on it.
You'll learn about Google Ads variables, choices and options and how to measure what is going on at your website.
This provides you with information to make decisions about what is working and what is not working.