Using this standard WordPress format is a "win-win" for your website's health:
Browser-level image lazy loading for the web | Articles - web.dev
The code snippet you provided is a piece of HTML typically generated by to display an image. Each part of that tag serves a specific technical purpose to help your website load faster and look better. Breakdown of the Code
: Search engines like Google favor fast-loading websites, and lazy loading is a key way to improve your "Core Web Vitals" scores.