I've been told that a wood beam will work, but I've always seen steel I-beams in other houses. Is it possible for wood to do the job? What are some of the pros and cons of wood I-beams and of steel?

I’ve been told that a wood beam will work, but I’ve always seen steel I-beams in other houses. Is it possible for wood to do the job? What are some of the pros and cons of wood I-beams and of ...