I haven't checked recently if this Google product still exists. You know Google, they just decide to add or remove a product as they wish. It's like a collection of articles and then when you type in the search bar the keywords you're looking for, you can easily see all those articles you're looking for.
Unfortunately, during the initial stage of my research, I encountered two obstacles. The first one was misleading Feed. One Feed has a title related to Austrian economics, but its contents have nothing to do with the subject and are filled with irrelevant news and product promotion of all kinds.
The second obstacle I encountered was the difficulty in handling secondary materials.