These are bundled wallpaper packs for phones. There are bundles of static wallpapers and bundles of live wallpapers. All are high quality, at least full HD (1080 x 1920 px). More precise information in the each products description.
Bundles are ZIP folders, open / unzip / extract the folder to use them.
When purchased, you will instantly get a secure download link, which will work 24 hours after the first download. Keep your downloaded files safe and secured.
If you are using Android, you can use for example Wallpaper Engine to set a live wallpaper on your home screen. Unfortunately, I have no idea how live wallpapers work on iOS.
Some of the wallpapers may also be available to purchase / download via Zedge App and Walli 4K.