Log into CSE and click on Control panel –> Refinements –> Add refinement.
Refinements are labels that you apply to websites. They appear as a list of links above search results, offering users a way to narrow their search. When a user clicks a refinement label, the sites that you have labeled are given priority in the results. In addition to labeling sites, you can also specify additional words that are added to users’ queries when they click a label, providing even more targeted results.
Google maintains a list of existing refinement labels. If you create a label with the same name as one of these, or with the same name as a label in another search engine that you or someone who is collaborating with you has created, users will also have the benefit of seeing relevant sites from these sources in their search results also.
Here refinements acts like the key word help for finding the relevant articles in our blog.