SDK-842 update copy

Author: echo-branch

Branch-SDK/Branch-SDK/Branch.h

@@ -679,7 +679,11 @@ typedef NS_ENUM(NSUInteger, BranchCreditHistoryOrder) {
 - (void)setNetworkTimeout:(NSTimeInterval)timeout;
 
 /**
- 
+ Set disable_ad_network_callouts server flag.  Default value is NO.
+
+ By calling this method with YES, the flag disable_ad_network_callouts = true will be set on all events for a user.
+ Those events will not be sent to ad networks that have been specified by the customer on the dashboard.
+ Customer is required to select the ad networks that the event should not be sent to on the dashboard in order for the flag to be effective.
  */
 - (void)disableAdNetworkCallouts:(BOOL)disableCallouts;