For a lot of people a business is known for its staff.
In the case of very small companies the staff are the company.
So if you are in business and you are using Twitter / Facebook bear that in mind. If your “personal” account is going to be associated, even indirectly, with your business account just take a moment to reflect before you post.
Reflecting does not equate with modifying or changing your personality. Personality is important.
It just means that you should think a bit before you tweet. Once you’ve posted it there is no going back.