Web traffic also comes from mobile devices. Due to this, you need to make sure that the websites are well optimized to operate on mobile browsers. The best way to check if your website is mobile browser compatible is to test it on real devices.
This opportunity is provided by testing tools that are designed to test a website on mobile browsers with iOS and Android operating systems. There is no need to download emulators, you just need to log in, enter the website URL you want to test and choose the device & browser and start testing.