Mentions in time shows you the exact number of mentions across a given timespan.
Reach in time weighs the number of mentions with their reach, presenting an estimated number of impressions.
If an event generates a high number of comments, it will cause a peak on the mentions in time chart. This doesn't necessarily mean a corresponding peak on the reach in time chart — that will only happen if the mentions generate a high enough reach. Conversely, a single mention can generate an enormous reach spike if it goes viral.
Updated about 2 years ago