Hello Hello Bluevelvet!
yes your son is right! It is important to have a good SEO strategy and presence in order to better optimize the search engine, which is also important if you want to convince multiple customers that you are the right person for the task at hand ...
So that you have an idea in mind, explain what SEO means. SEO is short for Search Engine Optimization.
Of course, you can do this yourself, but you should first find out more about it for example herehow best to do SEO. I've read stuff that says that with good SEO, the rate of customers increases significantly.
I hope I could help you with that!