It sounds like you’re asking “where did it come from?” in a vague sense, so I’ll cover a few common angles and you can tell me which one you had in mind:

• If you mean IT/Pennywise from Stephen King’s It: Pennywise is an ancient cosmic entity that inhabits the macroverse and feeds on fear. In the story, it arrived on Earth long ago from a realm associated with the macroverse (often linked to the Deadlights in the lore) and has periodically awakened in the town of Derry, Maine, to feed. The entity’s presence predates human civilization, with its awakening cycles tied to fear patterns in the local population. [Reference: fictional universe details]
• If you meant the origin of the phrase “where did it come from” itself: The phrase is a general query about origin, often used to ask for the source of something (an object, idea, or event). In English, it’s formed from “where” (location) + “did” (past tense of do) + “it” (the subject) + “come from” (origin). The construction traces to common Germanic roots and Latin influence that shaped question formation in English over centuries. [General linguistic background]
• If you’re asking about the origin of a different “it” (a technology, tradition, or cultural item): please specify what “it” is (e.g., a product, a concept, a word, a tradition). Then the origin can be traced through historical records, etymology, or cultural timelines.

To move forward, could you clarify:

• What specifically does “it” refer to in your question (the IT entity from Stephen King’s novel/films, a phrase, a thing, or something else)?
• If it’s a factual topic (like a product or historical event), do you want a concise origin summary or a deeper, sourced explanation?

Once you confirm, I’ll provide a precise origin explanation tailored to that target.