Update Shortcodes doc to add details on Macros for templates (#2035)

docs/content/documentation/content/shortcodes.md

@@ -5,8 +5,7 @@ weight = 40
 
 Zola borrows the concept of [shortcodes](https://codex.wordpress.org/Shortcode_API) from WordPress.
 In our case, a shortcode corresponds to a template defined in the `templates/shortcodes` directory or
-a built-in one that can be used in a Markdown file. If you want to use something similar to shortcodes in your templates,
-try [Tera macros](https://tera.netlify.com/docs#macros).
+a built-in one that can be used in a Markdown file.
 
 Broadly speaking, Zola's shortcodes cover two distinct use cases:
 
@@ -18,6 +17,8 @@ The latter may also be solved by writing HTML, however Zola allows the use of Ma
 rather than `.html`. This may be particularly useful if you want to include headings generated by the shortcode in the
 [table of contents](@/documentation/content/table-of-contents.md).
 
+If you want to use something similar to shortcodes in your templates, you can use [Tera macros](https://tera.netlify.com/docs#macros). They are functions or components that you can call to return some text.
+
 ## Writing a shortcode
 Let's write a shortcode to embed YouTube videos as an example.
 In a file called `youtube.html` in the `templates/shortcodes` directory, paste the