Let's you choose a font for your posts or pages from the admin edit page for your posts or pages. Will load the styles into the page dynamically
Choose the HTML identifier for your posts and pages in your theme. Then, choose the fonts you would like available or add a font from the Google WebFonts Repository.
In the Google Webfonts repository, get the names of fonts from here
When editing or adding a post, just choose the font from the dropdown. You will see they are previewed for you as well.
This is an example of what the possibilities are for your post when the fonts are applied.