Guest blogging is not just about links, it's also about raising your reputation in the eyes of your readers in your specific industry. Watch the video below to understand what Google has to say about guest blogging for links
Getting backlinks could really help grow the reputation of your website on search. So if you are guest blogging for links, you should make sure that your content is of high quality and unique whether you are posting it on a highly ranked site, or a low ranked site. Even if you want to pass out the same content to different quest blogs, try to make sure you take time to make it unique because it really matters.