FYI
I know many here are not programmers and so the differences between keyword search and semantic search may seem confusing or they may want to have more insight into how it works. While the following is for programmers, it is basic enough that you can learn some of the key concepts about the differences between the two search methods without being a programmer.
DeepLearning.AI recently (08/14/2023) added this free basic course on
Large Language Models with Semantic Search (ref)
which can be found on the short courses page.
For those who pay attention to who’s who in the world of AI, they should recognize a few of the people presenting.