Do you know how or why it is some articles get marked with a "special" blue politics tag? It's happened to my work a few times and when it does, they seem to get more visibility. I'm not sure how it works, though.
A few years ago, Tumblr created a number of curated tags. Or, rather, they turned uncurated tags into curated ones and put people in charge of stocking them with featured posts. One of them is “Politics” and there are certain posts — usually at least ten each day, sometimes as many as fifty — that allow Tumblr users who follow the Politics tag to see a diversity of posts they might not ordinarily see; these tags are also a good way to find new blogs, by following the people whose posts are featured and by following the editors.
Some of the editors are employed in some way by Tumblr; some are volunteer editors who are asked by Tumblr to curate the tag. I’m one such volunteer. I’ve been doing it — shockingly — for two years now (which seems like a pretty long time, especially because I think I was asked to do it for six months or something like that). When I see an interesting post, I can click a button and “promote” the post to the Politics tag; this is how the post gets the highlighted blue Politics tag on it that people might see in their dashboard; it also sends the post over to the Politics tag and people who follow the tag might see a notification in their Search bar to let them know that there’s a new post to be seen at the tag’s page. That’s how the posts get more visibility.
Here’s a post I wrote back when I was first asked to be a volunteer editor; it’s about how I plan to use my powers for good and also some problems I have with the way the whole curated tag system works. I think it holds up pretty well.