To add meta tags in WordPress, use an SEO plugin like Yoast or All in One SEO, or manually add meta tags by editing your theme's header.php file.

To change the author in WordPress, edit the post, and select a different author from the "Author" dropdown in the post settings, or use a plugin for bulk changes.

To put WordPress in maintenance mode, use a plugin like WP Maintenance Mode or create a custom maintenance page by adding a code snippet to your theme's functions.php file.

To edit the footer in WordPress, use the theme customizer, edit the footer widget area, or modify the footer.php file in your theme for custom changes.

To reset a WordPress site, you can use a plugin like WP Reset, or manually delete content, themes, and plugins to restore the site to its default state.

To change the font color in WordPress, use the theme customizer, block editor, or custom CSS to adjust text color sitewide or per specific element.

To tell if a website is built on WordPress, check the page source for “wp-content” in the code, or use online tools that detect the platform.