Update README.md

README.md

@@ -347,8 +347,7 @@ Add the following keys to your app's `info.plist` to define the initial consent
 
 Use Google's `setConsent` method to update the relevant consent checks when the appropriate purposes are consented to/rejected.
 
-> The consent checks updated via the `setConsent` method will vary and depends on how you are implementing Google Consent Mode 2.0 on your mobile property within the Sourcepoint portal. Review Sourcepoint's implementation documentation below for more information:
->
+> The consent checks updated via the `setConsent` method will vary and depends on how you are implementing Google Consent Mode 2.0 on your mobile property within the Sourcepoint portal. The method should only be called with consent checks that are mapped within your vendor list to custom purposes.<br><br>Review Sourcepoint's implementation documentation below for more information:
 > - [Implement Google Consent Mode 2.0 on GDPR TCF (mobile)](https://docs.sourcepoint.com/hc/en-us/articles/26139951882643-Google-Consent-Mode-2-0-GDPR-TCF-mobile#h_01HPHHGSP42A36607MDC7NVBV9)
 > - [Implement Google Consent Mode 2.0 on GDPR Standard (mobile)](https://docs.sourcepoint.com/hc/en-us/articles/26159382698387-Google-Consent-Mode-2-0-GDPR-Standard-mobile#h_01HPJ2MT0F5B1G8ZZVD5PNXT9S)
 
@@ -365,6 +364,8 @@ func onSPFinished(userData: SPUserData) {
 }
 ```
 
+Be advised that the `googleConsentMode` object in `SPUserData` will only return values for Google consent checks that are mapped to a custom purpose within your vendor list. For all other Google consent checks, the response will be `null`.
+
 ## Adding or Removing custom consents
 
 It's possible to programmatically consent the current user to a list of custom vendors, categories and legitimate interest categories with the method: