How to get rid of Junk email

Report junk mail

1. On your iPhone, iPad, or iPod touch with iOS 7 or later, open the message, tap the Flag at the bottom, then tap Move to Junk.
2. On your Mac, select the message and click the Junk button in the Mail toolbar. ...
3. At iCloud.com, select the message, then click the Flag button and choose Move to Junk.

Identify and filter junk mail in iCloud - Apple Support

https://support.apple.com/en-in/HT202315