Zuckerberg (and a small group of other Meta shareholders) hold shares that have 10x as much voting power as normal shares. He has about 90% of those special shares, giving him a solid majority in most matters.
Some other companies like Lyft or Alphabet have similar structures, but it is very unusual.
I'm actually surprised it's not more common. If I buy meta stock I have zero expectation of being able to sway company decisions. I just care that if they make money I make money.
During periods when VCs have more leverage they'll lean on founders to not issue dual class stocks, since of course it reduces their power to fire CEOs when things aren't going well.
A bond is just a loan that is repayed with a fixed return. A stock is equity and can be worth a lot more. Stocks are riskier than bonds, but have a greater profit potential.
Which you prefer depends entirely on what your investment goal is.
Some other companies like Lyft or Alphabet have similar structures, but it is very unusual.