What is if someone's snap score goes up are they ignoring you?

It's not necessarily true that someone is ignoring you if their Snap Score is going up. A Snap%20Score increases from sending and receiving snaps, not just from interacting with you.

Here's why their Snap%20Score could be increasing even if they're not responding to you:

• They're snapping other people: The most likely reason is that they are actively using Snapchat and sending snaps to other friends or groups.
• They're receiving snaps from other people: Even receiving snaps increases their score.
• They're posting to their story: Posting to their story may increase their score.

In short, a rising Snap%20Score simply means they are using the app. It doesn't confirm or deny that they are intentionally ignoring your messages. You can't conclude they are ignoring you solely based on this.