When you write your content, which by now you will know to write regularly and to make it unique, the end result you want is for your website and content to rank well in the SERPs (Search Engine Results Pages).
To help your pages rank and to attract traffic, it helps if you can link to the relevant pages using appropriate text for the link.
If you want to rank for a particular keyphrase or for long tail searches under a particular topic, then it helps to cement the relevance of your site by linking to the most important page on your website for that topic or to link back to an earlier post on that topic.
For those certain keywords you deem important to your website, you can use plugins on your blog to automatically create links for these and this will save you some time and ensure you don’t forget. So when you create your posts, remember to link to relevant content.