You aren't getting clicks because your audience isn't asking what you are telling them.
Tl;Dr - Re-targeting is a form of digital advertising that can help you keep your brand in front of bounced traffic after they leave your website.
When it comes to design, your biggest cost is time. This tends to get costly when you don't have the basic necessities in place to design the website.
SEO stands for Search Engine Optimization and you really don't need to be intimidated by it.