The direct answer
A swipe file is a personal, ongoing collection of content ideas, formats, or hooks worth remembering, saved as you come across them. It is not something you sit down to invent from scratch when you're running low. The name comes from a much older habit among writers of saving effective ads and copy for later reference.
Why saving in the moment matters
A good idea or format noticed while scrolling tends to be forgotten by the time you sit down to plan content. A swipe file removes the dependency on remembering. The moment you notice something worth saving, it goes into the file, so planning day pulls from an already-collected list instead of an empty page.
What is worth saving
Not only full post ideas. Smaller pieces are just as useful:
- A specific hook or opening line structure that caught your attention
- A content format worth adapting to your own topic
- A question you were asked that could become its own post
- A caption structure that made a point unusually clearly