what is wp_query in wordpress ?

What is WP_Query? WP_Query is a PHP class for constructing queries to the WordPress database and returning posts, pages, or other custom objects to render on the page. It allows developers to build complex searches while removing the need to write separate SQL queries

WP_Query is a PHP class in WordPress which loads content from the database. Developers rely on WP_Query to build custom lists of content that display on the site's front-end. You need to use WP_Query to load these tour posts from the database.