Check if main blog page is used in wordpress

Is blog

function is_blog() {
 
    global $post;
 
    //Post type must be 'post'.
    $post_type = get_post_type($post);
 
    //Check all blog-related conditional tags, as well as the current post type,
    //to determine if we're viewing a blog page.
    return (
        ( is_home() || is_archive() || is_single() )
        && ($post_type == 'post')
    ) ? true : false ;
 
}

// Usage:  if (is_blog()) { echo 'Blog page!'; }