The question here has a clear answer I gave to an author, but it was converted to a comment.
In the past I often tried to comment on your answer and to give a hint how to write good answers. Please take a minute to review the sites above and to think about how your answers could be improved. I really appreciate your work in this site and hope this will help to improve your answers.
When posting an answer, it's worth thinking beyond the current askers needs. Stack Exchange sites are designed to be repositories of information for many people, not just the original poster. How often have you done a search for keywords related to a problem you were trying to solve, and the first result was a link to a stack exchange site that answered your question?
Now imagine in 10 years time you do a search for this problem or one similar, and the only answer is a link to a site that has taken that particular page down, or moved, or no longer exists. This will not be helpful, and you'll think twice before clicking through to another answer on the same site. This is not just a moderator inventing rules either, the help center for all Stack Exchange sites spells it out quite clearly:
Provide context for links
Links to external resources are encouraged, but please add context around the link so your fellow users will have some idea what it is and why it’s there. Always quote the most relevant part of an important link, in case the target site is unreachable or goes permanently offline.
Try to make your answers future proof by copying bullet points or other useful information from any links you might post.