1. Contacts are maintained at the organization level. In the old version, it was mandatory to add contacts to a list.
   
2. When contacts choose to unsubscribe, they will be unsubscribed from the organization.
   
3. Your contacts will be mapped with the default topic "Marketing".

1. The existing topics will be seamlessly migrated to the new version.
   
2. If the contacts choose to receive certain email campaigns on certain topics, they can do so under Manage Preferences.  
   
3. Emails will be sent to contacts associated with the selected topic. The email will only be delivered to contacts associated with a topic.
   
4. A mailing list can contain contacts mapped to different topics.
   

How to migrate to the new Topics version

1. After logging in to your Zoho Campaigns organization, click the red Action Required button in the top bar.
   
2. Click Migrate now in the window that appears.
   
   
   
   
3. Alternatively, go to Contacts and click Manage Topics. You'll see a yellow banner in which you can click the Migrate now button.
   
   
   
   
4. Read through all the changes that will happen in the latest version carefully to be prepared. Click Proceed.
   

During the migration

1. New Topics cannot be created during migration.
   
2. Mailing lists involved in the migration will be locked during the migration, which means email campaigns can't be sent and bulk operations can't be performed.
   
3. Consent Emails already configured will be stopped.
   
4. All Topics will be enabled after migration by default.
   

Best practices for topic creation   

1. Classify topics under relevant products or brands. This will provide better clarity to your contacts while subscribing.
   
2. The topic name should be simple and clear. You can come up with interesting ways to name them, but the names should not be misleading.
   
3. Add a brief description for all of your topics. This helps your contacts understand exactly what the topic covers.
   
4. You can create lists for internal use and classification of contacts. Avoid creating topics for such purposes.
   
5. Maintain a minimum number of topics under each brand. It helps your contacts to manage their preferences easily.

Assign topics to existing contacts  

1. From the Navigation Toolbar to the left, click Contacts.
   
2. Click All Contacts.
   
   
   
   
3. Select the necessary contacts by clicking the checkbox present to the left of each contact.
   
4. Click Assign Topics under More Actions.
   
   
   
   
5. Select the topics to be associated with the selected contacts and click Save.