Can somebody please give me some information on the history of microorganisms and how they helped us? (preferably a book, mostly a website)

Bacteria are microorganisms that many times get a negative
reputation, however, most are harmless and some we couldn't live without. There are
bacteria that produce vitamins, help with digestion and occupy niches that otherwise
would be home to harmful bacteria. Probiotics are bacteria found in yogurt and are
actually good for your digestive system. Bacteria of decay help with decomposition of
dead organisms, thereby returning chemical compounds that would otherwise be lost, back
to the environment. Some bacteria are nitrogen-fixing bacteria and can convert
atmospheric nitrogen into nitrates that plants can use to synthesize plant proteins.
This is an important part of the nitrogen cycle. Bacteria are necessary for the process
of fermentation and products like cheese and sauerkraut are made utilizing bacteria. The
link below provides additional references including books and articles regarding the
importance of bacteria.