This message helps the person decide whether he should visit your web page or not. Remember, the person who is browsing the directory does not have unlimited time. He can't visit every page, wait for all your fancy graphics and multimedia presentations to download to his PC and then figure out that this is not what he is looking for. These front end descriptions help him figure out whether he should go forward and visit your page or not. Help him make the right decision.
Every search engine uses a different algorithm.
You might say what do I have to do with that. Well, if you conduct a search using the different search engines, you will see that different companies show up in different order. Some companies may not show up at all while others may appear but right at the bottom. When a search engine finally pulls up your page, the description is not what you want it to be.