What are precise benefits that I can get as an investor from investing in exchange traded funds (ETFs)?

What are Exchange Traded Funds (ETFs) and how do they differ from Index Funds. How should I as an investor make a choice?

I propose to invest in Gold ETFs (Exchange Traded Funds). What are the basic things I need to know about gold ETFs before investing in the same?

Are these exchange traded funds some kind of futures trading? Like are the Nifty ETFs the same as buying a Nifty futures contract?

What are gold backed exchange traded funds (ETFs) and how do they compare with other forms of gold investments?

Why do stocks get delisted from the stock exchange and what are the reasons that stocks get delisted from the stock exchange?

What are the mistakes that I need to avoid once I have committed my funds and actually made an investing?

What exactly is meant by Oscillators and what are the clues that one can get from them for intraday trading?

If I am doing a fundamental analysis of a stock, what are the key questions that I need to be asking to get a clear view?

What are some of the major applications of exchange traded funds and how do they fit into the portfolio of the investors?

I understand that e-mandates can be given in case of systematic investment plans of mutual funds. How do these e-mandates for SIPs work and what are the benefits and risks in this method?