What are GM and IM norms

I've heard in order to become a grandmaster or international master you have got to have a certain rating and several norms... What are they? I know I'm not going to have such titles in the future I'm just curious :) 😄

All it means is that you have to get the GM and IM titles by playing in several tournaments with enough existing grandmasters or international masters to meet the FIDE requirements and your performance in those tournaments has to be as good or better than what they calculate a GM or IM should reach.

wikipedia explains:

To qualify for the title of Grandmaster of chess, a title awarded by FIDE, the World Chess Federation, a player must achieve two or more grandmaster norms in events covering a minimum of 27 games. Norms can only be gained in tournaments that fulfill FIDE's strict criteria; for instance, an International Arbiter must be officiating and the entry must include at least three GM titled players from different countries playing over a minimum of nine rounds, with no less than 120 minutes thinking time per round. There are a number of other more minor stipulations.

https://www.fide.com/fide/handbook.html?id=174&view=article