Bots and spiders or other crawlers represent non-human activity on the web. In some circumstances, these bots, spiders, or other crawlers are legitimate - e.g. "good" - but they are still non-human nonetheless.
While these bots, spiders, or other crawlers are good, they may trigger ad impressions under certain circumstances and must be filtered out in order to protect performance data.
General Invalid Traffic (GIVT)
Identified by its user agent as a known bot