I. Through Accounts Tab To receive notification of Collection, you need to:
Go to 'Account'
Click on 'Notification' option
Here, you will find the list of Collections
Checkmark the desired collections
Click on 'Save' to update
II. Through Collections Tab To subscribe for notification through this method:
Click on 'Collection' section
Click on a particular Collection ex. Popular, Kurtis
Tap on the Slider button in the top right corner
Notifications for that Collection will be enabled
Note: Using the second method, you will receive notifications for the Collection, that you opted for, as well as the notifications for the 'For You' catalogs.