Most new Webflow designers will immediately drop an Image element everywhere they want a picture to appear. For some things, that's exactly the right approach. For other things, it creates challenges.
In hero areas;
In CMS items, you have similar problems - plus;
In many cases using a background image approach is a superior choice.
Keep your images efficiently sized.
When you're using a background-image approach, Webflow cannot prepare a media srcset, and browsers cannot download a smaller version.
This means you don't want t be lazy with your asset preparation, or your mobile performance will suffer.
TIP: Use WEBP images whenever you can.