People seem to think that bigger words make their subject, and themselves, more important. People today 'perceive' things instead of 'viewing' or 'seeing' them. Others 'utilise' things instead of 'using' them. One of the most succinct commentaries I've come across for encouraging plain talk came from an executive who told his staff, 'Don't utilise utilise. I try to avoid pompous language.
Some people use it as an oral status symbol to impress others.
Others use it because they've simply forgotten how to talk in simple, clear, everyday terms. This trendy talk is spawned by fads, events, and personalities. Words and phrases born out of trendy talk become instant cliches. Sometimes using one of these catchphrases will help you make a connection with someone you're talking to, but doing it often makes you sound unoriginal, as though you can't think up your own expressions. And nothing is worse than using yesterday's catchphrases.