Microsoft Flow has an RSS Feed action that can be used to retrieve news feeds from web site that implement RSS feeds.
On this blog I am aggregating feeds from a range of blog from the Dynamics 365 and PowerApps community. Find it here https://www.powerappsguy.com/news
The news aggregator also serves up a RSS feed that can be used to retrieve a feed of news from the community.
In the below example I will show how you can setup a simple Microsoft Flow to receive notifications when new blog posts are published.
The flow will implement the following trigger and actions
Note, push notifications requires that you have the Microsoft Flow app installed on your mobile phone
Once saved you will receive a notification on your mobile phone every time a new blog post is aggregated.