Article Spinner or Article Rewriter, as the name itself gives you an idea, is a rewriting tool or a paraphrasing tool that allows people to rewrite their content while saving significant amount of time. Many such article rewriter and article spinner tools are available over internet. Some article spinner tools are completely free, requiring no installation or fee while some article rewriter tools can ask you to sign up or pay.
Think of it this way: What do you have more chance of hitting, a distant, tiny target or the broad side of a barn? For the sake of search engine optimization, you want your website to be the broad side of barn. The more quality articles, or unique readable content, your website or blog offers to search engines (and therefore the general public) the more exposure your website will receive from major search engines.
When you obtain one-way links as well as immediate visitors, you should properly address your document for it to be optimized well. Otherwise, the publication address for your target article may be confused and lost along the way. Extending your document is usually republished. There is a tendency that the WordAI can lose the article you are writing.