Investopedia

There are lots of different metrics and buzzwords that competitors, investors, or other groups you may have to work with will use. One of the best resources for getting up to speed on a lot of the jargon that will show up is Investopedia. Investopedia covers everything from corporate finance, to public stocks, to venture capital.

Corporate Finance Institute

CFI has a series of free articles and courses for those who may want more assistance when unpacking their financial statements or even setting up basic ones. Their free introductory accounting courses will be a great help for anyone who is interested in learning more about the books of their business. CFI offers paid courses as well for more advanced topics.