You may use them on as many of YOUR OWN WEBSITES as you want.
You MAY NOT resell any part of the template bundle or use them on client websites if you are a web or graphic designer.
Here is the full policy:
The Elementor Templates are customizable templates for use solely in the Elementor WordPress plugin. All use of the Elementor Templates are also subject to Elementor’s terms and conditions. To use the Elementor Templates, you must remove the WP+BFF LLC branding and stock images before use and insert your own branding and images. Any violation of this provision may result in liability for copyright and trademark infringement. Detailed instructions for use will be provided and it is your sole responsibility to confirm you are complying with all customization requirements. WP+BFF LLC disclaims all liability related to your use of the Elementor Templates and is in no way sponsored, endorsed, administered, associated or affiliated with Elementor.
Purchases of Elementor Templates are for individual use only. You may not share or sell the Elementor Templates to any third-parties and the Elementor Templates must remain in your own WordPress account. You may not use the Elementor Templates for client work. If a client wants to use the templates, they must purchase their own copy of the templates and load them into their own account.
Mix and Match Brand Kits are covered under Kristin Rappaport’s policies.
If you want to buy an unlimited license to use the page templates on your client sites, please contact me at firstname.lastname@example.org