My mac says that "other users" are using up more than half of my storage. When I go to all profiles, it also says that "other users" are taking up all that space. I do not know how to see where this is being used up to make free space on my laptop.

The only way there could be other uses is for you, or some other user, to have created them.

If it's your property, if you're the owner, and you don't want them there, remove them. Of course, the courteous thing to do is inform the others users first.

Look again. That should be "Other Category" which s a potpourri of files which can include:

• System temporary files

• macOS system folders

• Archives and disk images (.zip, .iso, etc. - often found in the Downloads folder)

• Personal user data

• Files from the user’s library (Application Support, iCloud files, screensavers, etc.)

• Cache files: browser, Mail

• Mail messages & attachments

• Fonts, plugins, extensions

• Safari reading list

• iTunes backups

• Crud resulting from jailbreaking your iDevice

• Game data

• Saved data files

• Call history

• Notes

• Media

• Voice memos

• Other files that are not recognized by a Spotlight search

• Media files that cannot be classified by Spotlight as a media file because they are located inside of a package

• Files created and modified by other user accounts on your Mac.

They can be located anywhere on your hard drive.

The files that you have control over are located in the Documents, Downloads, Pictures, Music and Movies folders.  You can use either of these two free apps, GrandPerspective  or OmniDiscSweeper, to find the largest files on your drive so you can determine if they can be deleted or moved to an external HD for storage.  

Note: you can empty the Downloads folder after the apps and/or updates that were downloaded have been installed or applied.  Many users have found a couple of Gigabytes of files in their Downloads folder which are no longer needed. 

You Mac is not telling you about other users, it is referring to the Other category of storage in use by the operating system.

Reference: See used and available storage space on your Mac – Apple Support (UK)

In particular, this passage from that content: