Task: I want to create a photo folder named My Favorite Trip and add all these photos to this folder because I want to manage my photos in the gallery app, and I'm going on a trip soon, so it will help me to identify the photos.
Steps:
Go back to the previous page 
Click on the Folders tab at the bottom of the screen
Click on the three dots icon at the top right corner of the screen to view the New Folder option
Click on the New Folder option to create a new folder
Type My Favorite Trip in Folder name section to set the folder name
Click on the Create button to save the folder 
Click on the circle icon of the photo to select it and add it to the folder.
Click on the circle icon of the photo to select it and add it to the folder.
Click on the circle icon of the photo to select it and add it to the folder.
Click on the circle icon of the photo to select it and add it to the folder.
Click on the Copy button to add these photo into the My Favorite Trip folder.