What is the best plugin for the website ?

I think testimonial.to is a pretty good plugin.

Depends on what technologies you are building with and what the website is for. IF you are building with Wordpress, then I guess Jetpack is a must have. But that is just one of many must haves.

Which website? LinkedIn: Careerflow's LinkedIn Optimization (Just launched today on PH!) Twitter: BlackMagic Gmail: MailTrack

Plugins help solve problems or perform a specific function. The most important thing is to determine your goal and then use those solutions that I can best fulfill it. For example, I read in the article https://anyforsoft.com/blog/usin... about Varnish for Drupal 8 and it seems to be the best solution for my project