Do I need to enter Alzheimers and Alheimer's? Do I enter the singular and the plural, nudibranch and nudibranchs? What about word combinations, such as Alzheimer's, Parkinson's, and Disease, vs. Alzheimer's disease and Parkinson's disease? Which is better, the individual words or the word groups? Is it better to have more tags or less? Can you have too many? I have read many hubs on SEO and will continue to do so trying to figure this thing out. I'm also sure that there are some things I need to be asking, but don't know it? Any help you can provide in the meantime will be greatly appreciated.