wordpress plugins

Hello to all
After more time want return to wordpress for help my wife ,her is a terapist in rome.need to upgrade their wwbsite appart local seo
what is the must have plugin ?
ok isn't the best question but there are a tons of plugin make harder to choose..

Hi, please visit this thread it's summarizing most important plugins for WordPress
https://www.blackhatworld.com/seo/wordpress-plugins-to-help-you-rank-and-secure-your-site.1235808/

or this thread:
https://www.blackhatworld.com/seo/your-top-ten-wordpress-plug-ins.1236100/

If you need Page Builder to easily edit your pages and build your website, I recommend using Elementor