A paragraph shoustrates an idea, sums up the point, and primes the reader for the next paragraph. Ideally.

This afflicts all written media, but it is particularly infamous for its effect on Comic Books. One of the first things learned in comics is how to use dialogue bubbles effectively; a writer not allocating space carefully will end up covering their panel with a bunch of text and white space. Eventually the reader will realize that they’re just looking at plain text rather than the vivid form of storytelling by imagery that comic books are famed for. TL;DR indeed. At best, a Wall of Text is just a signal of really heavy exposition. At worst, they are a warning sign that the author is soapboxing about something. Speaking in Panels is often a way to evade this trope while recounting what happened. If Speech-Bubbles Interruption are used to show it