An article spinner will give you another version of your article. It will rework what you have written, so you can post different versions of it on different websites.
However, you need to read the spun versions VERY carefully because the synonyms used are often so archaic and strange that any reader struggles to understand what you have written. It is OBVIOUS that the article has been spun, rather than being unique content in the true meaning of the term.
The other point about an article spinner is that it can never create originality. The best articles are those you write that are based on your own original ideas, on your experience of the world.
If you are writing at all, then presumably you enjoy the writing process and the transfer of your thoughts onto paper or screen. Writing allows you to convey your ideas to your readers. Readers enjoy your writing and to spin an article detroys its structure.
You might use an article spinner to rework an aricle, but you MUST spend time editing it. Sometimes the editing process takes longer than writing the article afresh would have done.