Elementor comes with a limited plugin which you can use for free
Just download and activate it from your WP admin menu plugins->add new
The Pro version which i highly recommend has more of everything, there’s many more plugins and an indispensable theme builder aswell as a popup builder and loads of premium templates, well worth the price, infact it has so many features that means this will enable you to build advanced professional sites without further plugins (just have the elementor plugin to update instead of multiple plugins makes maintenance so much easier).
Build Fully Mobile Responsive Sites
From the editor you view what the website looks like on three of the standard screen size devices (Desktop, Tablet and Mobile Phone)
And the web content for vaious elements of a widget can be attuned for specific devices you can for example exclude a widget from appearing on a smartphone but allow it on the desktop and tablet.
I find this feature to be one of the easiest ways to create responsive sites (no setting of breakpoints as this is all worked out for you), the screen instantly shows what your website looks like as you make your changes!
Click the banner advert
I am both a happy user of Elementor (i’m on their multi-site plan as i am a freelancer who users their plugin to create great websites for my clients) and one of their affiliated salesman, if you click their banner advert i should (if all goes according to plan) receive a small commission to help me keep going with Hiya!