A single-page website, often no longer than the height of a computer screen. Your splash page is supposed to act as a placeholder for a full product site in order to establish credibility while your product or company is still in the early stages.
Here's an analogy.
Just like a movie trailer teases what hasn’t yet been released, a splash page proves that your company or product is “real” and credible, and builds excitement for what’s to come.
Why does it matter?
If you have a business, you need a website. But startups move fast, and as a result, it can be nearly impossible to create, update, and maintain a website in the early stages of a business. When you’re ideating every day, your brilliant idea from last week might be in the garbage tomorrow. You need a temporary placeholder.
How does it apply?
For digital products, splash pages allow you to experiment with messaging, build a potential customer base, create anticipation, and drive downloads and sign-ups.