Auto-tagging is an account-wide feature that applies to all ads and campaigns in your account. When enabled, tracking information is added to the URL so the landing page can determine which specific ad was clicked. With this information, Google Analytics can understand the relationship between a given visit to your landing page and the ad that triggered that view from Google Ads.
No, unfortunately we can not guarantee that the absolute safety of Google Adsense Traffic. This is because we have seen instances in which websites were penalized for receiving large bulks of traffic (and clicks) to their Google Adsense ads. Therefore, if you use it, we strongly recommend you to use it in moderation and in conjunction with other traffic sources. More information >>