OG...you've alluded in other threads that you are 15...seriously, is that your age?
I ask because any teen who is earning income can open a Roth IRA.
More on that in a moment.
You can buy individual stocks, but that is quite risky. There are however, accounts called "Index Funds". That is where a set amount of money is taken out of your checking account each month by an investment firm, and they purchase with your money a wide array of stocks (actually small percentages of numbers of shares, which accumulate) The goal of an Index Fund is to at least match the average of what the rest of the market is doing.
Generally, this is a safer way to invest, as even though some stocks will decrease, others will increase.
People get really jazzed up about wanting to beat the market. If over the course of your working years you do as well as the average of the stock market, you will be doing very well indeed.
IRA stands for "Individual Retirement Account"
A "Traditional IRA" is one where you invest a set amount of money each month, like in an Index Fund above. The money you put in it each year is not taxable, so you pay a little less in taxes each year.
A really better alternative for someone young who is commited to setting aside money each month is a "Roth IRA" In a Roth IRA, the money you put aside each month is taxed, BUT, and this is a big BUT, ALL money your savings earned over the years is completely tax free!!
Below is a link to a calculator where you can put in your age, amounts you're planning on saving, and for how long and at what rate.
Roth IRA Calculator
You'll see that it really adds up.
Some investment firms will start an account for you with just a few hundred dollars, and with putting in as little as $50 a month. Of course, as your salary increases, you'll want to put in more and more until you meet the maximum.
When you become employed, hopefully the company you work for will have a Matching 401K
A 401K is an investment account your employee handles. You can sign up and have them take a percentage of your pay automatically and put it in this account...it can be as little as 1%, upper limits will depend on the company. 401K's are not included in your taxable income.
When a company "matches" it's 401K, that means free money for you.
Let's say the company says they will give you a 50% match up to 4% of your investment.
That means that if you invest up to 4%, they will add in 50% of that amount for you.....anything you contribute over 4% won't be matched, but it's still the best way for most working people to prepare for their retirement. You should always contribute enough to your 401K to at least get their match
Example, let's say you make $400 a week and put 4% in the 401K....each week you contribute $16, they contribute $8, a total of $24 a week.
These are all VERY basic investing ideas, but it's best to get the basics down.
You're not a retard....you're asking a very important question.