A video demonstration for this topic can be found in your website dashboard, under Video Tutorials > Yoast SEO Tutorials
Under the Yoast SEO panel > Keyword tab, the Snippet Preview will show how the page or post will appear in Google Search results. Editing the settings on this tab will update in real-time, showing us the effects of our changes.
The first thing you need to do on this tab is to enter the Focus Keyword. This is the main topic or phrase that summarizes what this page or post is about. This is also the keyword we want people to search for in Google in order to discover this page or post.
You can also set this article as a cornerstone content by ticking the box next to "This article is a cornerstone content". Cornerstone content is an article that you are most proud of and reflects your business and communicate your mission.
You also have an option to preview how the snippet is viewed from mobile and desktop by clicking on its corresponding buttons.
From this tab, you can also edit the snippet to change the SEO title, slug and META description.