This is in regards to the description that appears underneath your page in search engine results. Search engines will often pull that information from DMOZ. Using the noodp tag asks the search engine to not use the description from dMOZ and instead use what you have included in the meta "description".
Usually we do not need to stop search engine to pull the information from Dmoz because it help us change the meta title and description with the keywords and description that more near to what people search and the CTR actually is better.
I do not know exactly what it is, however your post contain useful information related to SEO. I have noted down.