Tips on choosing reliable plugin

  1. Check out who the developer of the plugin is, seeking out plugins developed by respected authors in the WordPress community to avoid problems.
  2. Star ratings, user reviews, and the support forums are all good places to get an insight into how the plugin is working for others, looking for plugins with an abundance of five-star reviews.
  3. Consider the experience of your visitors when interacting with your site – is it free of clutter, functioning correctly and quickly, and appealing to the eye? Will the new plugin help or hinder the user experience.
  4. Keep an eye on which plugins you are using or no longer using on your site,  removing any plugins from your site that you don’t need, including any inactive items.
  5. Check the documentation – look for a thorough description, tutorials, and screenshots of the plugin in use.
  6. Look at the updated version date stamp and the number of downloads or active installations – a credible and well-established plugin will be regularly updated and have high download statistics.

Source: https://premium.wpmudev.org/blog/too-many-plugins/