Reference links in Markdown let you define a link at the bottom of your file and then reuse that link definition anywhere in the file.
This has two main advantages:
1. Updating the link definition updates all reference links using it.
2. Stylistically it places all links at the end of the file and can make inline links easier to read.
Reference links also work for images and you can even use shorthand to make them even more concise.
#markdown