This website is catered for the US and UK markets. The reason for this being that these are the two markets I have experience in.
Note: The majority of brokerage accounts allow you to buy both UK and US stocks and we will tell you if they don't in our list of recommended brokers.
US market
Advantages
Cheaper entry to stocks (as little as $1 buy and $1 sell)
The U.S. market is more liquid. There are more people buying and selling stocks therefore making it easier for you to buy and sell stocks.
Disadvantages
The US market is slightly more volatile meaning you can make or lose money faster than the UK market.
UK market
Advantages
If your from the UK you know many of the companies you are investing in.
The market is slightly less volatile therefore your money is slightly safer.
Disadvantages
Its expensive to buy and sell stocks (£6 buy and £6 sell on average).
Stamp duty 0.5%. This means if you buy £2,000 worth of shares, you will have to pay £10 to the government each time.
Note: To actually buy shares you need a brokerage account.