A question about "Hell" as taught in Judaism

Hello,

I am involved in a discussion, found here, about the subject of Hell. The conversation has grown to what the Jewish faith espouses about an afterlife.
And I was wondering, as I posted a link to an "All Experts" site wherein two different experts on Judaism contributed to say that Judaism Hell is completely absent from Judaism. (All Experts link)

And at another All Experts page here, which says in the last part:

Gehinnom is a purification process, borne out of your choices on Earth. It is not G-d’s payback time. Gehinnom is designed to purify a soul so that it can enter Gan Eden. A soul generally needs not more than a year of purifying before it may enter Gan Eden. When mourners say kadish during this time, they ease and expedite the process for the deceased’s soul. A soul has to earn access to Gehinnom, to cleanse it for entry to Gan Eden. Rogue souls are blocked from Gehinnom and often wander in limbo until a saintly person intervenes to assist their progress. A wicked soul can sometimes be sentenced to live as an animal, plant or stone for a time rather than enter Gehinnom.

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There still appears to be a conflict despite those statements by Jewish faithful deemed expert on the topic within the thread that appears here at CF.

My question, hopefully in the correct forum, is if anyone here would be so kind as to contribute from their Jewish faith perspective.

I thank you for your indulgence in reading my post.