This is a sample tab that differs from a blog post because the tabs stay in one place and are usually displayed in your site's list of internal links (in most layouts). Most people start working with tabs from a "About Me" tab that introduces them to site readers. For example, they say:

Hello friends, I am an office worker during the day and a taxi driver at night, this is my blog. I live in Ahvaz, a city in southwestern Iran.

Or something like this:

XYZ Company was established in 1986 and is a provider of industrial products. The company has 2,000 workers and employees. We hope you are satisfied with our products.

As a new Persian WordPress user, you can go to your counter to delete this tab and create new tabs. Good luck!