You can use tabs to display different pieces of related content side by side, for example if you have content in multiple languages, or SEO content for a webpage or blog post.
To set up multiple tabs in a structure or template:
1. Open the template editor
You can edit a template from the template tab by selecting the template you want to edit, or from in an Item by clicking the link in the top right to either "Edit Item Structure" or "Manage Template".
2. Click "New tab +"
You can duplicate and delete a tab by clicking on the cog to the right of the tab name.
3. Name your tab and press 'return' or 'enter' on the keyboard
4. Add the fields you need to the new tab
5. Click "Save Template"
See more on tab actions such as duplicating and deleting tabs here.