generalInvalidClickRate property
The percentage of clicks that have been filtered out of your total number of clicks (filtered + non-filtered clicks) due to being general invalid clicks.
These are clicks Google considers illegitimate that are detected through routine means of filtration (that is, known invalid data-center traffic, bots and spiders or other crawlers, irregular patterns, etc). You're not charged for them, and they don't affect your account statistics. See Filtering invalid traffic to ensure quality.
Implementation
core.double? generalInvalidClickRate;