App Exchange has come with new look and lots of features.
App exchange is providing relevant solutions on the homepage based on a customer’s profile, install history, and site activity when customers log into AppExchange.
Trailhead
We can access Trails from App Exchange.
New Lightning Solutions
Add Lightning Data and Bolt Solutions to the thousands of apps, components, and consultants that customers can find on AppExchange.
Lightning Bolt Solutions enable customers to launch communities with partner-built industry templates.
Refer Salesforce for more info.