Tags are used by search engines to decide what your article is about. Although you only need to put your article in a couple of categories, put a lot of tags on your article. Pick tags that you think someone might use to find your article in a search engine. Whenever possible put in the community as a tag and when you have it, put in the zip code as a tag.
Don’t use geographic terms like the city, the county or the subdivision as tags. For example, Vienna, Arlington, River Towers and Kingstowne are NOT tags. Instead these are categories.