I would suggest only buy coins from regulated websites and don't trust individuals.

Also, if there is a community manager that asks you to buy the coins from a link and not from the ICO company's website, that is most likely a scam.

ICO stands for initial coin offering. It is a way to raise funds where investors get coins depending on the amounts they invest. These coins may be utility coins which means it can come with discounts and other privileges. The coins value may increase in time especially if the ICO project succeeds.