Entry points ? The visits are accurate for the website and app. If you're talking about AI overviews, then that's meaningless for reasons I've already explained.
I do understand why it makes it very hard to compare but it's certainly not meaningless. Google's AI overviews are pretty much the only way that I use AI.
I mean we're all talking about how Google is 'catching up' and 'taking over' Open AI right ? In that case, it genuinely is meaningless. AI Overviews, even if it had the usage OP assumes, is not a threat to Open AI or chatGPT. People use chatGPT for a lot of different things, and AI overviews only handles (rather poorly in my opinion) a small, limited part of the kind of things it gets used for. I use AI mode a lot. It's better than Overviews in every conceivable way, and it's still not a chatGPT replacement.
I guess I use Google's AI that's built into their search engine the same way I've used ChatGPT or Claude. I ask it a question and it provides me an answer. I can then interact with it further if I want or look through the rest of the search results.