grouping websites in one "folder" in Safari on Macbook Aiir

Hi

I’m trying to group a number of websites together on the sidebar. For instance, you will notice two tabs on the sidebar: “Venice Trip Nov 2025” and “Permanent Travel Websites”. On the right you will see 8 thumbnails of websites. I want to save those websites pertaining to Venice in the “Venice Trip Nov 2025” and the others in the “Permanent Travel Websites”. I don’t want to open them at the moment. Can I have a folder, as we have on the Home Screen on the iPhone that I can group them together?

Many thanks

Brian