I have discussed link building wherein other websites link your content. But you might also want to think about doing the same. It is normal to think that it might drive traffic away from your page. But it is an integral part of SEO strategy. 

When you link back to authority pages that have relevant information and are trustworthy, you give the visitor good information. This makes your website a place of valuable and quality information and helps with ranking.

It also shows some amount of trust between the two websites and you can expect reciprocation when you create content that is helpful or relevant to their website. For instance, when you want a blogger to link back to your website, you can expect a better response if you do the same. 

This is not about quid pro quo but about using the information from each other’s site to improve Google rankings and give the user what they are looking for. 

With enough goodwill, you might even get a shoutout from such authority websites when you do a good job with your content.