Yes I think most of us are aware of this about Sheol.Hebrew(Old Testament)
1"Sheohl" the correct translation would be grave, pit
2"Hades" same as "sheohl" meaning grave, pit
3"Tartarus" meaning a holding place(prison) for rebellious angels(demons) awaiting judgement
4"Gehenna" Greek transliteration of the Hebrew term "Valley of Hinnom"
5? Lake of fire
Why is this important?
Because of the false teaching of hell there are many left wondering if they or a loved one suffers after death- which they dont. The bible clearly teaches the "dead know nothing"- Eccl 9:5
The biggest reason the truth matters is for God's reputation. Burning people alive forever is not an act from a loving or just God. Their ceasing to exist is enough of a punishment, "For the wages sin pays is death"-Rom 6:23 The false teaching of hell pushes people away from Him...who would want to serve that unjust god?
But we also have to keep in mind the teaching of Christ, esp. in St. Matthew's gospel (?) about eternal fire and punishment after judgement (e.g. his explanation of the parable of the darnel).