It is btter to just avoid them even if you do understand.
why does an alt coin need an IPO, if it is "good" people will make all the websites, store fronts and other useless crap.
I am all for alt coins, but this IPO business is.... well I promised myself I would try to stop being negative.. so I will stop talking now..
They are just selling a new altcoin before its launch, before anyone can mine them. If you believe the new altcoin has potential, you can buy the altcoin during the IPO instead of mining them and you win more profits when its price go up. The reality is most altcoin flops and those invested in the IPO loose money.
If you do not understand what an IPO is, it is better to avoid them.