PostEasePosting a link with nothing else to react to
A post that is just an outbound link, with no context or opinion attached, tends to get less reach than the same link shared alongside a real take on why it matters. Part of this is a structural preference for keeping people on the platform; part of it is that a bare link gives a reader nothing to reply to.
Ignoring replies on your own posts
A reply thread that a poster never engages with tends to lose momentum quickly, and momentum is a real input to how far a post travels. Responding to a few early replies signals that the conversation is live, which tends to invite more of it.
Treating every post as a broadcast
A feed made up entirely of announcements, with no question, opinion, or reply to anyone else, reads as one-directional. A one-directional account earns a shrinking share of attention over time, since the platform is built around back-and-forth, not a bulletin board.
Leaning on hashtags instead of clear language
Stuffing a post with hashtags in the hope of discovery does less now than writing the post so its own words are unambiguous. Modern ranking systems read the text well enough that a hashtag is rarely doing much independent work.