What it means
Google's documentation calls this element a “related questions group” and also records the “People also ask” label that the interface shows above the block. The abbreviation PAA is the form that dominates professional conversation about it.
It is worth separating it from the elements it gets confused with. The featured snippet occupies a single position at the top of the page and answers the query exactly as it was typed. The questions block groups several derived queries and keeps each one closed until somebody expands it. Related searches, at the foot of the page, offer search terms with no visible answer.
The difference from the AI-generated summary is of another kind. That summary writes new text out of several sources, whereas the questions block reproduces literal passages from specific pages and shows the source link alongside them. The two now share the same screen. Google has also begun filling part of these answers with generated text, which blurs the boundary between the two formats without having removed the block.