Cross-browser testing helps to ensure the compatibility of the website on different browsers that are used by end-users that's not possible while testing with local machines.
Cloud-based cross-browser testing has its own advantages like
Required Test Environments are preconfigured, no setup time required.
No need for infrastructure maintenance.
Scaling up or down can be done in a few clicks.
What we need to do is to create the tests, select the cloud test environment to run our tests, and start executing, that's it!