There was something missing, especially on shared albums. Some way to prominently add a remark while browsing through the photos.
Now it's possible. The new update to the Google Photos app made it happen. But not only that, albums are now created automatically with the greatest moments. Of course you can deny to add it to the library. It's also possible now to add a map and location to your albums inside. Together with videos, it's an amazing new way to make a prettier album for your trip, event or whatever you want to show.
You can also link this on your website, blog or favorite social network, so everyone can see it. Nice.