Spoiler

Spoilers are information about a text or a performance that can ruin the readers' surprise and/or enjoyment if the readers learn about them before they have reached the stage at which they should, or desire to become aware of this information.

For instance, revealing the twist ending to a movie, or the identity of the killer in a murder mystery, can spoil the audience's appreciation of the suspense in its first acquaintance with these stories.

In the context of a discussion of feminist SF, it is often necessary to reveal information that might spoil new audiences.

Spoiler warnings can forestall the possibility of accidental exposure to spoilers.