In plain English
A recorded appearance of a result in a search environment, according to that platform’s reporting rules.
Why it matters
This instrument can help answer a focused measurement question when it is connected to a real objective and read alongside relevant context.
Example
A small organisation records this signal for a defined page and period, then compares it with related instruments before deciding whether to investigate a change.
Common misunderstanding
An impression is not a website visit and does not prove that a person read the page.