Review miningUnmet need
A complaint that repeats in rivals' low-star reviews. Not a keyword - a positioning opportunity.
One-and-two star reviews do not produce keywords; for those you read the 4-5 star ones. Low stars do a different job: they show the work nobody in the category does well.
When the same complaint repeats across several rivals it is no longer a bug, it is a category gap. That gap belongs in the product roadmap and in the store listing alike: promising the thing your rivals are most criticised for is the cheapest differentiation there is.
rankcusp collects these themes on the Unmet Needs screen and keeps the reviews that produced each one beside it - a summary is not separated from its source.