A valid search is when you view results and then start an analysis (Get Sentiment for Google or Get Highlights for Amazon) that returns at least one result.
An invalid search is when:
After 10 invalid searches (Google and Amazon combined), 1 query is deducted automatically.
Note: Queries are consumed only when an analysis is started and returns results.
In short: 4.0+ = Positive, 3.0–3.9 = Neutral (on Amazon: Mixed), <3.0 = Negative.
For Google Places
For Amazon products