Photos is a great app. It consolidates all of your pictures in one place, makes them searchable, easy to share, and with iCloud Photo Library takes the stress out of transferring photos and videos from your iPhone. But with convenience comes clutter. I took a look and I have 27,000+ photos in my Photos app. I don't take a lot of pictures, but WOW did that thing fill up. And a ton if it is garbage. Photos of cabinets, garage doors, broken gates, an old air conditioner, the shower before we re-grouted the tile, gas pumps, and all types of random uselessness fill it up. Sure most of what is in there are great memories, but so much is just junk. I bet I'm not the only one, so here are some tips to clean out the garbage.
The Photos app has several different sorting features so you can quickly find photos that you no longer need or want. You can access these sorts from the left-hand column, or using the View -> Photos drop-down menu.
Places: Select this sort to find photos by where they were taken. It's a simple way to drill down to those photos of a long completed construction site and just get rid of them. It also allows you to discover photos from trips and events that you can group into albums or share with family and friends.
Duplicates: This sort is self-explanatory. This will show you all the duplicates and allow you to unburden your database of the additional clutter.
People: Well, this one could be kinda harsh, but if you want to search and delete photos related to a specific person, this is where you can begin.
But the good news is that digital clutter doesn't make your computer slower or your phone heavier. It's just clutter and sometimes cleaning it out can be a good thing. | 
