0–20% – an indicator that the content is copied from other web resources or pages of the same site. This indicator has an extremely negative effect on promotion and can lead to sanctions from search engines.

20–50% – the text is not a very high quality rewrite, i.e. rewritten with some changes. The publication of such content leads to a decrease in positions. If the site as a whole is of poor quality, it may be penalized by search engines.

50–80% – the article is a quality rewrite. The publication of such materials does not harm the position of the site; in some cases, successful promotion is possible.

80–100% – article is unique. The publication of such texts leads to better positions, especially if other promotion methods are used, such as keyword optimization.