Shortcodes
After saving a grid you will find the shortcodes for it in the top right of the grid edit page:
Simply copy and paste these shortcodes where you want the grid and filter to appear.
In the classic editor, use the red grid button in the visual editor to easily add the filters and grids you’ve created wherever you want.
Easily add the shortcodes to any post or page.
On the Grids > Settings > Advanced page you can pick the post types you want the button to appear for.
WordPress 5 doesn’t have this backend interface to show this red grid…
is there no shortcode?
With the new Gutenberg block editor you can add a shortcode block instead and basically just put in the shortcode you find in the top right of the grid edit page.