A slash is used to create either/or words and Uniform Resource Locator (URL) Web addresses.
The slash in either/or words should rarely be used. Wherever possible, use or instead of the slash. Most writers avoid he/she, his/hers, and him/her as singular genderless pronouns. While the awkward he or she, his or hers, and him or her, is grammatically acceptable, most writers prefer a plural sentence structure using they, their, and them. Slashes are used to separate elements of Internet addresses (the URLs). Poetry uses a slash between spaces to indicate a line break.
As a general rule, don’t use slashes in storytelling. They will naturally show up in the few cases where they are necessary.