When you’re setting up your Twitter profile you have the option to provide information about yourself (or your company / product / service).
If you want to be taken seriously by other users make sure that you haven’t made any basic spelling mistakes!
So, for example, if you are trying to promote yourself as an expert in “development” don’t spell it as “devleopment”.
(We all know that people will make spelling mistakes and typos when “tweeting”, but that’s a different issue entirely!)