Just out of curiosity, is there any point at all in writing a description for the links you submit in web directories, or on social bookmarking sites, if you're only doing so for the anchor text?
Yes, because this will describe what your site is and why people should visit your site. The description itself should best describe the anchor text you used and should be well-written, no grammatical errors and unique
That's from a consumer behavior standpoint, but how does that sentence of text affect the link above it (if at all?)
Description is very important task in SEO, Because it plays the major role,it is attractive traffic will increase soon.