SEO Copywriting is writing content that is optizmized for search engines. This means that every text content or article must contain few keywords which will bring more visitors to your website.
"Stuffing" keywords and "thin" content are not good SEO practices. "Stuffing" keywords is and google can add red flags to your website. "Thin" content means content or article with less than 500 words.
No. Google shows web pages in search results based on the authority and relevance of the page. What they need to do this?
Google looks at relevance of your page by analyzing your content. This is based on few factor plus where and how often you used search terms aka keywords in your content. Google also measures the authority of the page which constists of number of links linking to your page and how trustworthy those links are.