If you ever see "TMI" posted on an online message board, you may know that it stands for "Too Much Information." It's usually a warning, or a complaint, that you're telling us more than we want or need to know. (Example post title: "Personal Hygiene Question (possibly TMI).")
While "TMI" usually refers to unpleasant subject matter, it can also be applied to cases of epic rambling or brain-crushing detail. I even think of it in terms of spilling the beans unnecessarily. I recently watched a rotten old B-movie where a guy was being beaten up by a lynch mob for a murder he didn't commit. Meanwhile, the guy's friend spots the real murderer in the crowd, grabs him, and starts slapping him around. The culprit immediately falls to his knees and starts yelling, "I didn't mean it! I didn't mean to kill her!" Um, okay. Thanks for sharing. You might consider not representing yourself in court.
We sometimes offer too much in our marketing copy. It's tempting to spew out all the facts and figures, reams of testimonials, or volumes of microscopic detail about what we do. It's hard to resist posting every single conceivable question and answer on our FAQ page until it resembles an FAQ book. (Be honest, are all those questions "frequently asked?") We want to stagger our readers with our comprehensive knowledge and solutions -- but who wants to be staggered?
If you throw information at a reader until steam comes out of his ears, he can't focus on the key points that piqued his interest in the first place. Worse, you've allowed no space for the reader's imagination to roam. It takes two to communicate, and if you've created an impenetrable brick wall of information that fills every single crack, answers every question, anticipates every thought the reader might have, then your reader has no room to insert his own imagination -- which means he can't envision your product or service making his life or business better. You've blinded his mind's eye.
Too much information will also cause you to lose queries. Once you've told the prospective client everything he needs to know, you've drastically reduced the chances of having a future conversation with that person. Sure, your prospect might call you right away to order something, but he's more likely to just file the pages away for future reference -- and keep shopping around.
The real point of effective marketing is to get folks excited enough to want more -- and they get that by talking to you. Once you've got that conversation, you then have the opportunity to build trust, set up meetings, or point out additional products or services that lead to a bigger sale or future business. Give prospects a reason to contact you!
Just remember: TMI (Too Much Information) = NEB (Not Enough Business).