To enable Subscription Management:

1. Turn on the opt-out users toggle.
2. Select one of the following in Criteria for opting out users:
   1. Default - This option is selected by default when opt-out is enabled. When this option is selected, users who have Optin as the value in their SMS subscription status(user property) will be considered in the target audience for campaigns (users who have opted to receive communication from your brand will be targeted when campaigns get sent from MoEngage provided they qualify in the segmentation criteria for the campaigns).
   2. Custom- This option enables you to select the custom user attribute that stores the opt-in status of users. For example, let the user attribute that stores the Subscription status of users be custom_user_property. The value of this attribute or users who have opted out of receiving communication from your brand is Opt-out. Then, you can select this user attribute in the dropdown and set the value as custom_user_property is Opt-out, as shown in the following image, to exclude users whose value for this property is Opt-out from receiving your campaigns.

To configure the keywords for SMS:

1. Turn on the Manage keyword-based responses toggle.
2. Click +Create keyword category to add keywords and configure them.