As we all know, the technical skills of many SEO companies often disappoint me, and even some influential companies in this industry are no exception. In fact, I believe that in the current SEO environment, no more than 30% of companies purchasing SEO services can obtain professional services. Therefore, I would like every person working in an SEO company to answer the following ten questions (using your brain, or writing them down on a piece of paper, or in an email to your boss). If you can easily answer these questions, then you might be among the 30% who can provide valuable services. If not, I still recommend that you study SEO thoroughly and work on some practical cases before offering paid SEO services.