There are many ways to make web page money. You can collect money directly or get it through another entity.
People are already looking for stuff on the internet. They're probably looking for your stuff too. Make sure you get your products and services in front of those folks, and explain it so they understand the benefits to them.
The most important part of making money from your web page is to make sure your customers are happy with your products or services. Make sure they get what they're expecting and more.
If you simply do that, your previous customers can help you get your future customers. If you don't, they could be your worst advertisement.
If you don't already have your own product to sell, some companies would like you to be a "commission only" salesperson for them. Affiliate programs send you commission checks when you send them customers.
Simply find products that support your field of expertise and tell them about the benefits. Show them how to accomplish their goals with these products.
Want to know the secret of how to write for websites? If you communicate well with your targeted visitor, more sales can be made. This means to communicate in their language, not your buzz words.