What is "All Souls Day"?

From Wikipedia I understand that it’s the day for praying which would help the souls leave Purgatory!, is that correct.

oce.catholic.com/index.php?title=All_Souls%27_Day

here

youtube.com/user/RealCatholicTV?feature=mhum#p/a/u/0/_vSvu-7lAB8

It’s simply a commemoration for all the faithful departed, nothing specific about Purgatory required.

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