I dont understand the collections tab and what to do with the gear displayed in it. Does anybody know a good tutorial for it.
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Collections is there to show you what you've collected and what items you've yet to discover. You can also re-acquire items from it such as emblems, shaders, mods and transmats. So if you collect a lot of them you don't risk running out of inventory space. You can delete them from inventory and they can be re-acquired via Collections at a later date.