Hello @Manpreet1,
You can use ''Service and Subscriptions" for this.
Here is the link to documentation : https://experienceleague.adobe.com/docs/campaign-classic/using/sending-messages/subscriptions-and-re...
step 1 : create a service for your product (something like ''interested in product X'')
step 2 : create a webapp that unsubscribe recipient from this service
step 3 : subscribe all your first target to this service and launch the campaign with the link to the webapp
step 4 : for futur target, use the subscription to the service to filter your target
Br,
Amine