Q2 What is typical mistakes with choosing keywords for topic intent?
I'd say one common mistake is choosing keywords from the wrong stage of the buying journey for what you're actually selling.
For example, if you're selling consulting or expertise, informational intent can be very valuable because you want to identify companies that are researching a problem you can help solve.
But if you're selling a software product and want to reach companies actively evaluating solutions, commercial-intent keywords, such as solution categories or competitors, are usually more relevant.