The webinar on the mobile-first approach and testing highlighted the growing importance of designing websites for mobile devices first, given the increasing reliance on smartphones for internet access. Hosted by LambdaTest and Applitools, the session explored the benefits of a mobile-first strategy, emphasizing its role in enhancing user engagement and retention. Anand Bagmar from Applitools discussed the challenges and considerations of adopting a mobile-first approach, such as understanding the target audience, choosing between native and mobile web apps, and the complexities of mobile testing compared to desktop testing. He introduced the concept of the mobile testing pyramid and demonstrated Applitools' Visual AI for integrating functional and visual testing. Mudit Singh from LambdaTest underscored the importance of mobile web apps and explained how LambdaTest supports mobile web testing with its cloud-based device lab. The event concluded with a Q&A session, offering insights into mobile-first strategies and testing practices.