Create a custom top-level menu page Wordpress

add_action( 'admin_menu', 'misha_menu_page' );
 
function misha_menu_page() {
 
	add_menu_page(
		'My Page Title', // page <title>Title</title>
		'My Page', // menu link text
		'manage_options', // capability to access the page
		'misha-slug', // page URL slug
		'misha_page_content', // callback function /w content
		'dashicons-star-half', // menu icon
		5 // priority
	);
 
}
 
function misha_page_content(){
 
	echo 'What is up?';
 
}