If you post a long article, you can make only a part of this article will appear on your page. Using WordPress, creating “Read more” link is very easy. Just do the following steps:
1. After you log in your WordPress, click “Posts”, then “Add New”.
2. On the WordPress posting editor, you have “Visual” and “HTML” tabs. Select “HTML” and then click “menu” icon so you will get the following html code in your editor.
3. Type your text before “<!–more–>” if you want it appears on your page, whereas your text which is after the “<!–more–>” can be read after you clicked “Read More” link.
Only a simple and common tutorial, do hope it is useful for you.