I am not going to visit the website you just posted here unless you explain how the mechanism works, otherwise I will assume it's just crappy advertisement in this post.
Phind is just prompt engineering, as is anything sitting on top of anything OpenAI is building right now - if you are doing Q&A then maaaaybe it does some resource augmented generation as well (say, from Stack Overflow or other technical resources)
Phind is often recommended to me by programmers who find it produces "better" results than a naive GPT-4 session, but I don't know that anyone has done any real world testing.
as explained before me phind is a website built ontop of GPT-4 + a free tier (which is what i use) - which uses what they call the Phind Model...though it changes often.
I understand your skepticism (because the internet is fully broken right now/and forum posts are more or less paid for content at this point)
but...its a bit funny you'd like someone who just explained they're a beginning programmer who got into programming because an LLM helped remove insane amounts of friction from the learning process to "explain a mechanism" to them.
Phind is often recommended to me by programmers who find it produces "better" results than a naive GPT-4 session, but I don't know that anyone has done any real world testing.