The adjective "global" and adverb "globally" imply that the verb or noun to which they are applied applies to the entire Earth as one unit. It is sometimes used as a synonym for international /internationally but this is incorrect:
Nonetheless, "global" has passed into common usage, especially in the media, academia, and the business world, and among left-wing supporters of a "one world" concept. Many use this term in situations where "international" would clearly be the more appropriate term, as there are few things that are truly global (even the much-touted "global economy" for example does not include Antarctica, North Korea, etc.)