How Is Network Activate Different From Activate (by Implementation)?

How is plugin network activate different from normal activation by implementation? What is done/not done in network activation that is done/not done in activation?

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  1. Network activation will activate a plugin for every site in a network whereas regular activation will only activate a plugin for the site you’re currently on. As far as implementation goes, there is one other important difference:

    If your plugin is built to do something when it’s activated (via register_activation_hook()), this will fire automatically when you activate a plug-in normally, but it will not fire for a network-activated plugin until you visit the admin screen for each blog.

    So if major database updates are tied in to register_activation_hook() they won’t occur until you log in to the other sites.