You wouldn’t want a competitor to steal your marketing ideas. So why would you want them stealing the words on your website? Although duplicating someone’s content is not supposed to benefit your search engine rankings, it is not uncommon for someone to steal or “scrape” text from your site without linking that content back to you.
What can you do about it? There is a site called Copyscape that will show you all of the websites that have and are currently scraping your content. Checking this will ensure that whether you are writing words for a blog, a product description, or a homepage, those words will either remain original on your site or will at least be accompanied by a backlink.
Copyscape has been widely covered by the press and should make a good bookmark for you to check from time to time.