I launched a new website on July 15th. I found through the Google Search Console that almost all pages have been indexed by Google. But its clicks and exposure are very low, including ranking. This is the picture of the Google Search Console, which has been declining since August 15th, because Google just released a core update at that time. I am not sure whether this situation is due to the sandbox or the core update. Please give me some suggestions. Or what should I do?