WhatsApp will be giving you more control over how much compression is applied to images and videos you send over its app. The company is testing this feature on its Android app, giving three quality options—Auto, Best quality, and Data saver. So, if you're worried about data caps or internet speeds, you can send a more compressed file. But if you want to send the highest possible quality that you can, there will be that option, too.
WhatsApp hasn't mentioned when this feature will officially launch. And the test is currently available on Android but not on iOS.
Source: The Verge