can someone explain to me all this i have no clue what the difference between a roth, ira, 401k is.
Common Mans version:
You dump money Into a fund, analysts get together and decide what to invest that money in, and over time the value of what they invest in goes up, so your contribution earns money. When it's time for you to retire(or you quit working and withdraw your money), they give you all your money back, plus the money you helped the fund earn. There's differences in the way the money is taxed for all the fund. Say you make 5,000/month gross and put $1,000 into your 401k, the government can only tax you on $4,000. But regardless the money WILL GET TAXED eventually, and be government will get their cut.
That's why back in 2008 when the stock/housing market shyt the bed people lost 10-25% of their savings, because they dumped money into funds that were invested into things that lost value.
I have a masters degree in Economics from UofC here in Chicago and Ill be honest with you, as much as analysts dress it up, it really is all a rouse of smoke and mirrors. You're gambling hoping that the number goes up until you pull your funds out, and hoping that the crashes don't obliterate your savings.
You want an in depth explanation, you can always pick up a book.