Rich4551,
It is most likely a vitreous floater. These can appear as black or dark spots in clumps, chains, or randomly throughout the visual field. Some patients describe them as looking like cobwebs.
The significance of floaters range from benign (they are just there) to being associated with disorders such as a retinal tear.
The only way to be sure is to have your eyes examined by an ophthalmologist. Good luck.