Any resource or link in the long run, directly or indirectly can earn you money. In order to attract the target audience, there are a range of activities with a common name of "promotion." In general, this is quite a long and tedious process, designed to increase traffic to the resource.
The most important element of promotion is to optimize the content. It should be easy to read and useful to the user, suitable for indexing robots. Qualitative thematic content enhances the position of a website in search results and attract new users, increase the citation index, and ultimately increases the opportunities to monetize traffic.
After the traffic to the site has grown, the link will become famous itself. The simplest and most common way is to post advertisement links on the website with most traffic. It can take the form of sales traffic - redirect users to a website partner sites using banner ads and contextual links. In this case the payment is made for clicks or for certain user actions (such as the purchase of goods or services).
Another way to earn money is the promotion of other websites in search engines. If the resource is highly valued by search engines especially by Google, the sites to which links are installed, too, receive a high rating. Selection of a particular method depends on the income level of site traffic.
More effective is the direct earnings for the users with the help of referral links. The simplest example is the organization of an online store. Third-party advertising resource, the owner of the site receives commissions that are part of the sales revenue. But if the sale is carried out on its website, all the income from the transaction will be available to the owner of the resource.