It is not enough to just create your website and hope people will visit it. You need to let them know it is there.
You would not build a physical store that is off the main highway and not tell people how to get there. It is the same online. The investment you have put into building your website will only pay off if people visit it and use the content you are sharing with them.
There are several different methods you can use to capture the attention of people and attract them to come to your website:
Organic Search - your content indexed by search engines with appropriate keywords
Referral links - connect your site to relevant content on trusted websites your audience uses
Paid adverts - targetted advertising campaigns displayed where your audience can see them