When posting an event, the first thing that pops up is a dialogue box asking if it's going to be a "member activity" or "event announcement". I'm not quite clear on what exactly is the difference? In some cases, it's a bit blurry on what it is, for example if I want to post something like "there is this public event x I'm going to, if anyone wants to join..."

I'm simply asking because I'm not sure what happens if I label something as an announcement/event. Will something happen like having it be automatically classified in a spam bin, or treated differently? I'd be thankful if I could get a bit of clarification on this.