Use slashes to mark line divisions in poetry quoted within running text and to separate alternative terms. Whenever a slash separates lines of poetry, it should be preceded and followed by a space.
Line divisions in poetry
In “Digging,” Seamus Heaney observes, “Between my finger and my thumb / The squat pen rests; snug as a gun.”
Alternatives
Then there was Daryl, the cabdriver/bartender.
—JOHN L’HEUREUX, The Handmaid of Desire
Slashes also separate parts of fractions and Internet addresses.