Your ad rotation settings determine how ads are served within an adgroup. While Adalysis can test your ads regardless of this setting, it’s best to use Rotate Indefinitely when you are ad testing to ensure all ads can get enough impressions to reach statistical significance (more info on ad rotation settings).
Adalysis will show a warning on the Dashboard screen when it detects campaigns that don't use the "Rotate indefinitely" setting.
Clicking on the above will open the 'Campaigns' screen below where you can see the Ad Rotation setting for every campaign.
You can modify your campaign rotation setting directly in Adwords.
If you prefer not to change this setting, or postpone making this change, you can dismiss the alert accordingly