Getting unique and authoritative links is crucial for higher ranking in the SERPs and improving your SEO. Google's algorithm on evaluation of links evolved in recent years creating a more challenging process now to get high quality backlinks. External links still matter and aren’t obsolete, so start working on strategies to get valuable backlinks to improve your search visibility.

Now that we know which content pieces are the link magnets, let's figure out who's doing the linking. Why is the "who" important? It's because these website owners have already pre-qualified themselves as link prospects by demonstrating their willingness to link out to a particular type of content, which in this example is content about "dog toys." So chances are good that they might link to our dog toy content.
You can safely assume that if the sites link to your competitors, you have a chance of getting a link from the site as well. Click on any backlinks website to get the exact URL that links to the competitor. View the type of content that links to your competitor and then send a request to the publisher to publish a link to your website in the same capacity. For example, if your competitor is included in a roundup list of businesses in your industry, reach out to let them know about your product or service. Give them a compelling reason that adding your business to the list will improve their readers’ experience.
In February 2011, Google announced the Panda update, which penalizes websites containing content duplicated from other websites and sources. Historically websites have copied content from one another and benefited in search engine rankings by engaging in this practice. However Google implemented a new system which punishes sites whose content is not unique.[35] The 2012 Google Penguin attempted to penalize websites that used manipulative techniques to improve their rankings on the search engine.[36] Although Google Penguin has been presented as an algorithm aimed at fighting web spam, it really focuses on spammy links[37] by gauging the quality of the sites the links are coming from. The 2013 Google Hummingbird update featured an algorithm change designed to improve Google's natural language processing and semantic understanding of web pages. Hummingbird's language processing system falls under the newly recognised term of 'Conversational Search' where the system pays more attention to each word in the query in order to better match the pages to the meaning of the query rather than a few words [38]. With regards to the changes made to search engine optimization, for content publishers and writers, Hummingbird is intended to resolve issues by getting rid of irrelevant content and spam, allowing Google to produce high-quality content and rely on them to be 'trusted' authors.