Like any cloud service, the Azure portal itself also gets functionality updates and changes. So how do you keep up with what's new?
Azure portal update blog
The Azure portal product team maintain a blog where they post a monthly summary of what's in the latest update. Visit the Azure portal blog and follow them for notifications via Tech Community or via RSS feed.
Did you know that Cosmos DB now has a Serverless capacity model, for consumption-based billing (in public preview)? That was in the October 2020 update!
Azure portal "How To" Video Series
The Azure portal team also publishes short "how to" videos on YouTube, under the Microsoft Azure channel.
Here are some of my favorites:
Improvements to the Linux Virtual Machine experience
How to monitor Azure Functions
How to connect to a storage account using private link