Very Readable Content – for this one they recommend setting the 1st input to “Very Readable” and allowing both sentence rewriting and paragraph editing (2nd and 3rd input), but disallowing automatic paragraph spinning (the 4th input). Keep in mind that this type of spinning will generate much less unique versions of your content as less synonyms will be used for the words.
Imo it is not possible for google to detect properly spun content, it is not worth computing power it requires. They can do this using ngrams for example, but it is uses a lot of queries. And for example article spinner I coded beats this algo, so google cant detect that the content is spun. Manual spinning is also good but it takes more than 30 minutes per article.
Use Paraphrasing Tool to paraphrase or rewrite full length essays and articles or to find new ways to express simple phrases, sentences or single words. Whether your goal is to remix textual content for a website, term paper, business document, email or tweet, Paraphrasing Tool will do the trick. Applications which stand to benefit from text rewritten by Paraphrasing Tool range from expanding blog and website footprint on the web with quality content to facilitating brainstorming for any essay or creative writing project.
Quality readable content is key here. Google, for example, will recognize that people are leaving your site soon after arriving if they perceive that your site or blog is full of junk content. This is called "bounce rate." If your bounce rate is high, then people are quickly leaving your site. But for the sake of your business, to build your online reputation and brand, you want people to visit your site, stay for a while, and then keep revisiting over the long term.