The Google Photos app is not just a photo management app, but also a photo editing app with some nice editing features. One of them is Colour Pop, which allows you to keep the subject in color and turn the background black and white. It is free to use with photos having depth information (such as Portrait Mode), but if you want to use it with photos lacking the depth information, you'll have to purchase the Google One subscription. Buying Google One subscription unlocks editing features on Google Photos It's unclear what other editing features Google will put behind the paywall in...
Source: https://www.gsmarena.com/google_photos_colour_pop_premium_editing_feature-news-46183.php
