News! First time for me seeing 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐃𝐢𝐚𝐠𝐧𝐨𝐬𝐭𝐢𝐜𝐬 in a Google Ads account.

This is similar to Conversion Diagnostics but just for Google Search Campaigns.

𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐃𝐢𝐚𝐠𝐧𝐨𝐬𝐭𝐢𝐜𝐬 𝐜𝐡𝐞𝐜𝐤𝐬:
▶️ Ads
▶️ Audiences
▶️ Account
▶️ Budget & Bidding
▶️ Goals

and reports any issues or warnings.

𝐅𝐨𝐫 𝐞𝐱𝐚𝐦𝐩𝐥𝐞: 
𝐀𝐮𝐝𝐢𝐞𝐧𝐜𝐞𝐬: "Your ads are not showing as often as they could. Update to broad match to effectively grow conversions within performance targets"

𝐀𝐝𝐬: "2 ad groups are limited by incomplete ads as indicated by their ad strength. Some of your ad groups can only serve in certain formats due to a limited variety of ads."

Once you click on "View Issue" a Campaign Diagnostics Tab opens with all explanations for your campaign.