README.md in jekyll-linkpreview-0.4.1 vs README.md in jekyll-linkpreview-0.5.0

@@ -32,10 +32,11 @@
 See https://jekyllrb.com/docs/plugins/installation/ .
 
 ## Usage
 
 1. Create `_cache` directory.
+   * This directory _must_ exist under your project root even if you've modified the [site source](https://jekyllrb.com/docs/configuration/options/).
 
 1. Embed [linkpreview.css](assets/css/linkpreview.css) into your Website.
 
 1. Use `{% linkpreview %}` tag.
 
@@ -47,10 +48,12 @@
 You can override the default templates used for generating previews, both in case Open Graph protocol metadata exists or does not exist for a given page.
 
 ### Template for pages where Open Graph protocol metadata exists
 
  1. Place `linkpreview.html` file inside `_includes/` folder of your Jekyll site (`_includes/linkpreview.html`)
+     * The folder is the same one you would store files for use with `{% include fragment.html %}` tag. 
+       Therefore, it *must* be under the [site's source](https://jekyllrb.com/docs/configuration/options/).
 
  2. Use built-in variables to extract data which you would like to render. Available variables are:
   * **link_url** i.e. `{{ link_url }}`
   * **link_title** i.e. `{{ link_title }}`
   * **link_image** i.e. `{{ link_image }}`
@@ -58,9 +61,11 @@
   * **link_domain** i.e. `{{ link_domain }}`
 
 ### Template for pages where Open Graph protocol metadata does not exist
 
 1. Place `linkpreview_nog.html` file inside `_includes/` folder of your Jekyll site (`_includes/linkpreview_nog.html`)
+   * The folder is the same one you would store files for use with `{% include fragment.html %}` tag.
+     Therefore, it *must* be under the [site's source](https://jekyllrb.com/docs/configuration/options/).
 
  2. Use built-in variables to extract data which you would like to render. Available variables are:
   * **link_url** i.e. `{{ link_url }}`
   * **link_title** i.e. `{{ link_title }}`
   * **link_description** i.e. `{{ link_description }}`