Benefits of installing a spell checker plugin When it comes to presenting a document to clients, professors or any audience, saying something smart and valuable matters. However, most people are likely to overlook your great content if it is riddled with typos, misspellings and mistakes. Producing flawless copy is a mark of professionalism; most companies expect nothing less in their documentation. One useful tool computer users can employ to edit their documents is a spell checker program or the spell checking functions offered by their word processor.