Aggregation of information is super powerful. Be it news sites aggregating different articles and categories based on your interests or locations or a personally-aggregated list of RSS feeds or subscribed newsletters.
Why
There’s way to much information out there to consume all of it. Reading primary sources is only possible in a very narrow area.
How
Let the crowd decide
Hacker Newsletter lists the top voted articles on Hacker News. Hacker News itself has an enormous amount of content flowing through and the newsletter is a quick way to catch up without spending much time.
Let an expert decide
Several people share what they read and find interesting in aggregate/summarized form. This format gives a prefiltered/annotated list of more low-level sources. These can take the form of weekly newsletters (e.g. Recomendo), daily blogs (e.g. Fefe) or even yearly lists (e.g. this one).