There are thousands of WordPress plugins available, which can make it difficult to determine which ones are the best and most popular. Here are a few of the most popular WordPress plugins that are widely used by website owners:

1. Yoast SEO: Yoast SEO is a popular plugin that helps optimize your website’s content for search engines. It includes features such as keyword optimization, sitemap creation, and integration with Google Search Console.
2. WPForms: WPForms is a popular plugin that allows you to create forms for your website, such as contact forms, survey forms, and registration forms.
3. Gravity Forms: Gravity Forms is another popular plugin for creating forms, including advanced forms with conditional logic and calculations.
4. Contact Form 7: Contact Form 7 is a simple but popular plugin for creating contact forms for your website.
5. WP Super Cache: WP Super Cache is a popular caching plugin that improves the loading speed of your website by creating static versions of your pages and posts.
6. Gravity Forms: Gravity Forms is a popular plugin for creating forms, including advanced forms with conditional logic and calculations.
7. WP Fastest Cache: WP Fastest Cache is another popular caching plugin that improves the loading speed of your website by creating static versions of your pages and posts.
8. W3 Total Cache: W3 Total Cache is a popular plugin that improves the loading speed of your website by optimizing your website’s code and creating static versions of your pages and posts.
9. WordPress SEO by Yoast: WordPress SEO by Yoast is another popular plugin that helps optimize your website’s content for search engines. It includes features such as keyword optimization, sitemap creation, and integration with Google Search Console.
10. Jetpack: Jetpack is a popular plugin that includes a variety of features for WordPress websites, such as security, backup, and performance optimization.

Keep in mind that the best WordPress plugin for you will depend on your specific needs and goals for your website. You may want to try out a few different plugins to see which ones work best for your needs.