Why this icon is getting displayed in my Mobile - Lenovo K5?

Welcome to the forums. That looks like the Google Assistant notification. If you don't have more information after expanding the notification shade, open the Google app - settings - Google Assistant settings - turn it off.

Also, restart the phone and see if the notification is still there.
 
Welcome to the forums. That looks like the Google Assistant notification. If you don't have more information after expanding the notification shade, open the Google app - settings - Google Assistant settings - turn it off.

Also, restart the phone and see if the notification is still there.

Can't find "turn off" in google assistant settings..
Please help