Some of which best practices include; W3C standards - These ought to adhered to by all pages, no-abusive keyword density and contain Sitemap.xml and Robots.txt actually. Makes use of will provide your website with some nice, eye appealing format. There are both large and small companies doing SEO. https://www.yjcon.co.kr/bbs/board.php?bo_table=free&wr_id=545028