To use these ready made templates, you need Elementor.
Download the .zip file containing the template and unzip it. Inside, you’ll find the .json files.
Before importing, go to your WordPress Dashboard and navigate to Elementor > Advanced. Enable the “Enable Unfiltered File Uploads” option to allow safe import of JSON files.
Navigate to the Template upload option within Elementor, select the .json file you wish to use (either the default version or the mobile-disabled version), upload it, and then insert the template into your page.