When creating links, you can use standard HTML or Markdown formatting. However, you can also implement an automated approach to linking that makes linking much less error-prone (meaning less chances of broken links in your output) and requiring less effort.
Edit me

When linking to an external site, use Markdown formatting because it’s simplest:

[Google](http://google.com)

Linking to internal pages

When linking to internal pages, you can manually link to the pages like this:

[Icons](mydoc_icons.html)

However, if you change the file name, you’ll have to update all of your links.