What does this mean for businesses? First, businesses already know that "word of mouth" advertising is the best kind of advertising. This upcoming change with Google Search helps extend this type of advertising to the virtual world of search. For Google, this encourages existing Google account holders to invite others to become part of the "world of Google."
Facebook already does this by scanning your personal "Likes", Hobbies and Interests and tells your friends that you like "X" Business or Service. Marketers know that relationships are the key to staying in business during this difficult time of our economy.
When "+1" for Google comes in your area, encourage your customers to seek you out in Google search and push "+1.