When generating the Minimal CSS files, there are 2 ways to go about it:
Individually: Click on the “wand” icon corresponding to the item you want to optimize. This method will only generate the minimalCSS file for the selected item.
In Bulk: Select all the items you want to optimize by clicking on the corresponding checkbox in each row. When you’re done making your selections, use the “Bulk Actions” dropdown menu to select the “Generate MinimalCSS” option. The plugin will create a scheduled job that will iterate through all the selected items. Individual CSS files are created for each item.
TIP: If you modify CSS that only affects specific pages, you can generate the new minimal CSS only for the affected pages without having to do this for all the pages.
Note: You only need to generate the minimal CSS files for post types and taxonomies which correspond to actual pages on your website. For example, the WooCommerce Product post type corresponds to product pages on your website. However, some custom post types (e.g. testimonials, team members, food menu items) might only exist as widgets on other pages. In those case, you don’t need to generate the minimal CSS files for those post types, even though they appear in the dropdown.
How to tell if a post type or taxonomy requires the MinimalCSS file?
After selecting the post type or taxonomy from the dropdown, click on one of the titles of one of the items. This will open a page showing the item as it might appear to your visitors. If this is, in fact, a page that you show on your website, then this post type can benefit from generating the MinimalCSS file.