Most of the times, the little yellow triangle alert signals a cannibalization* problem.
It lets you know that your landing pages might be cannibalizing each other, since they interchanged several times lately. By applying the advanced filter "Warnings >> Cannibalization", you can see all the keywords with cannibalization alerts:
To see exactly when the changes occurred and between which landing pages, select the last 30 days as the time frame and open the keyword timeline by clicking on the calendar icon:
The green or red circles signal the rank fluctuations triggered by the landing page changes. This insight can be easily shared with others by using the button in the upper-right corner.
On the keyword's page, the cannibalization events are marked with an [L] annotation. By correlating the rank fluctuations with the landing page changes, you can see which of the landing pages performs better in Google searches:
Once you have this information, you can take the appropriate SEO actions to ensure that you rank with the right landing page, for each of your keywords.
Here's a video to guide you through the main available metrics in your SEO Campaign:
*For indexability purposes, we could also refer to this in the “cannibalisation”, “cannibalise” or "cannibalising" spelling variations.