Have you ever worked in finance before?
I have not but the exact definition is the field that deals with the study of investments, I find a lot of it to be so confusing but some people eat it up like peanutbutter!
I know, some many different terms, that I do not understand, do they have a name for people that study this or work in the field of fiances?
It really depends on the field, there are three sub categories that finance can be broken into, public finance, corporate finance, and personal finance. I imagine each subcategory has a different name and companies may have different financial needs and some special titles. 
I see, it really does have a lot to it. What exactly is public finance?
Good question, public finance is the study of the role of the government in the economy. So think allocation of money and resources and government basically.
I see, I feel like our government may not be doing the best job there! So is corporate finance more about big businesses?
Corporate finance
Corporate finance is an area of finance that deals with sources of funding, the capital structure of corporations, the actions that managers take to increase the value of the firm to the shareholders, and the tools and analysis used to allocate financial resources. The primary goal of corporate finance is to maximize or increase shareholder value. Although it is in principle different from managerial finance which studies the financial management of all firms, rather than corporations alone, the main concepts in the study of corporate finance are applicable to the
announced departures of Jacqueline Leonard and Paul Nicholls who played Lorraine and Joe Wicks. Bradley said, "I have made a decision about leaving EastEnders and I have told the BBC about it. I know it is regular work and you are in the public eye, but it is time to move on. Much as I love playing Nigel, I would not like people to think that was all I did. I did a lot of work before EastEnders and I will after. I don't want to be like some people