These are collection of PLR products that anyone can click at each link and download and use as Bonus PLR Products or as you wish. They are actually the work of a well known high quality PLR products producer, hqplrstore.com, and they are basically prepared for affiliates so that they may get it easy to promote the vendor’s products.
They are everywhere these days. You can get them and download them for free from lots of websites. I can confidently say that my website is one of those sites that you can get hundreds of PLR content.
But there is a big problem of not knowing what to do with those huge PLR content you downloaded from other sites. Are you going to sell them as is? Or brand them and make profit? Or give them as bonus to the products you promote?
You can do all the above activities and see some results. But what about the competition? You must use a paid advertising to get your message out there, and that costs you so much money.
My best advice is to use search engine optimization to rank your posts so that you may get free traffic. Having these great PLR products at hand will definitely empower you to create unique content and claim first page on search engines for free traffic.