That allows a connection to a mirror of the steem blockchain. Everything on the chain is available to everyone at all times.I use steemSQL https://developers.steem.io/
Yes, that is one of the reasons I don't follow too many at one time, I can never find what I'm most interested in. You can also mute some followers like any resteemers etc.
Take care.
Thanks
Do I need a lot of SQL knowledge if I want to use this information myself?
Yes, you must understand the SQL query language. But there are examples out there on how to interface to Excel to SQL. See the help documents at the link I gave you.
Perhaps I should really start reading my SQL book I bought 5 years ago ☺️
But first I have an idea what I can do with this info.