For example, channel with one (1) global block claim + two (2) copyright strikes is a subject to monetization suspension.
You receive warning notifications on your YouTube Channel Dashboard from YouTube every time your channel incurs an infraction and you have an opportunity to solve a problem, BEFORE having monetization suspended in 40 days.
IF THE CHANNEL DOES NOT TAKE ANY ACTION, IT WILL LOSE AN ABILITY TO MONETIZE VIDEOS and any previously monetized videos will stop serving ads.
So, if you get that notification from YouTube, that means you have 40 days from that point to resolve the issues to keep earning on your channel.