If you use Twitter as part of your social media (private or as a business), and you only like to re-tweet or share other users opinions, you do not have to pay attention to many legal regulations. On the other hand, if you are an active user that enjoy creating tweets and share your personal opinion on this social media, you need to take some legal provisions into account.

Please make sure to understand and respect the general conditions of use of the Twitter service (right of free speech, expression of opinion are obviously allowed, but no abuse criticism is permitted) as the echo of your actions can take to unexpected consequences, such as infringement of intellectual property rights, etc.