On smaller worlds, a holoboard posted at a spaceport works well as a means of communication between spacers who frequent the same ports as well as a method of notification by local law and advertising.
On larger worlds, apparently, it's a chaotic mess. Stray bits of announcements regarding grand opening and firesales (sometimes for the same business) intermingle with bounty notices, local news, missing person posters, transport jobs, and the like.
Sorting through them them isn't an overwhelming task, but without anything to filter out the noise it's difficult to find anything in particular.