Let me just quote the website to tell you what this is about:
“The speech accent archive uniformly presents a large set of speech samples from a variety of language backgrounds. Native and non-native speakers of English read the same paragraph and are carefully transcribed. The archive is used by people who wish to compare and analyze the accents of different English speakers.”
It’s fascinating. I actually only found this site when Zooey Deschanel mentioned it. No, not personally to me, but in the JaneTV Exclusive Zooey Deschanel Interview (YouTube).