I read the wiki more closely and now I'm just wondering what the CollectionService is good for
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What is the CollectionService Useful For (Edited)?
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In simple, you can tag certain objects with a certain "key". You can get all objects that have that "key" using GetTagged(). This basically marks objects, for easy reference.
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Can you show me an example of what this is useful for? thanks for the response
'This basically marks objects, for easy reference.". It marks objects so you can find a group of certain objects where ever they are.