searchRankLostAbsoluteTopImpressionShare property
The number estimating how often your ad wasn't the very first ad among the top ads in the search results due to poor Ad Rank.
Note: Search rank lost absolute top impression share is reported in the range of 0 to 0.9. Any value above 0.9 is reported as 0.9001.
Implementation
core.double? searchRankLostAbsoluteTopImpressionShare;