External links honor the marketing principle of “What’s In It For Them?”
External links show how deeply connected you are to your subject matter, to resources , news and leaders in the field. They also show you are more concerned with getting your visitors to the information they seek, which renders you a helpful provider in their eyes and “not a bad Joe” to seek out should they wish to throw some money at you.
External links let you demonstrate how far you’re willing to take them to be of service
When the engines crawl and analyze your site’s external links, there are five key things you should bear in mind when developing your list or preparing for your SEO web copywriting. First and foremost, yes, you most certainly should be linking out. It may not be as important as it once was, but it is absolutely still a leading SEO priority. That said, the second thing you should bear in mind is that you really shouldn’t have more than 100 links out. If you’re sending them to that many other places, it kind of begs the question, is there anything valuable to be found at your site? Your outgoing link anchor text should be complete with relevant keywords, and your site should show link stability over time – if you thought it was valuable at one point to send them to the National Meteorological website, why are you suddenly changing your mind? Lastly, always make sure of the validity of your external links.