Determines whether the current visitor is a logged in user.

Determines whether the current request is for a user admin screen.

Determines if there is any upload space left in the current blog’s quota.

Learn how to check if a plugin can be uninstalled using the WordPress `is_uninstallable_plugin()` function in this article

Determines whether the query is for a trackback endpoint call.

​The article provides an overview of the WordPress `is_time()` function, which determines whether the query is for a specific time or not

Determines whether a theme is technically active but was paused while loading.

Determines whether there are translations for the text domain.

​Is_term_publicly_viewable() is a WordPress function used to determine whether a term is publicly viewable based on its taxonomy