An advertiser notices that clicks have suddenly increased and is concerned that they might be due to invalid activity. What is the first thing the advertiser should do to investigate this situation?
- Pause the affected campaign until an invalid clicks investigation is complete.
- Look at click patterns over time and rule out legitimate reasons for increased activity.
- Submit an invalid clicks report to the Google AdWords team.
- Submit new ad text variations for review.
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You can read more here: https://support.google.com/adwords/answer/2549113