Research the online reputation of the site. Look for independent reviews, expert recommendations, news articles, and other reliable sources of information about the site. A large number of negative reviews from trustworthy sources leads to a low quality rating of the page.
How to find reviews about your site? For example, the IBM site. Try using these commands in Google search: [ibm -site:ibm.com] — search for IBM, excluding pages on ibm.com. [“ibm.com” -site:ibm.com] — search for “ibm.com”, excluding pages on ibm.com. [ibm reviews -site:ibm.com] — search for reviews about IBM, excluding pages on ibm.com. [“ibm.com” reviews -site:ibm.com] — search for reviews about “ibm.com”, excluding pages on ibm.com.