Update source file API.md

Author: brave-support-admin

docs/campaign-performance/API.md

@@ -13,7 +13,7 @@ sidebar_position: 4
 ## Endpoints
 
 ### Campaign Details
-Retrieves all campaigns you have ran, as well as the ad sets and ads associated with them by ID.
+Retrieves all campaigns you have ran. For all campaign formats except search, the ad sets and ads associated with them by ID are included.
 ```
 GET https://ads-serve.brave.com/v1/api/campaigns
 ```
@@ -104,4 +104,4 @@ Day/Hour,Advertiser ID,Campaign ID,Creative Set ID,Creative Instance ID,Creative
 2024-01-31T22:00:00,ad5017b3,cmp932f4b3,crs819594b,cri7549f0ca,Sample Creative 1,Click here,https://example.com,1,0,0,0,0,android,architecture,0.00800000,0,0,30
 2024-01-31T23:00:00,ad5017b3,cmp932f4b3,crs19520db1,cri9086c13f,Sample Creative 3,Test creative 3,https://example.com,1,0,0,0,0,android,crypto,0.00800000,0,0,30 
 2024-01-31T23:00:00,ad5017b3,cmp932f4b3,crs819594b,cri4151a72d,Sample Creative 2,Test creative,https://example.com,1,0,0,0,0,android,gaming,0.00800000,0,0,30
-```
+```