There are dozens of catalogs in which PR articles can be inserted on the Internet. It is good to select catalogs of quality, with the highest ranks. It's just that the insertion of articles makes sense. Catalogues are available for free. Extra services are paid, such as highlighting an article, being able to place multiple links, or prefered placements.
If you embed PR articles in quality catalogs, you can benefit from it. But avoid the pages of poor quality. At that time, your efforts would be more detrimental than good. Another option to publish articles is to embed them in blogs or in magazines on the Internet. This is not a cheap option, though.
Publication of articles
PR articles are added for a fee to a lot of frequented and thematically close blogs, or to Internet magazines. It is necessary to contact the owner and arrange the price and cooperation.