Following onto my previous post, 1 Way to Increase Your Traffic with SEO, I mentioned how in the old-days of SEO, black-hat methods involved sharing links in as many irrelevant, low quality blogs to increase your back-links - although this practice can hurt your domain authority - link building still remains a cornerstone of SEO.
Link-building is a long-term, ongoing strategy where you build the amount of websites linking back to your website. Here are 3 ways to build links to your website (please check out Kissmetrics resource below...)
1. Guest blogging on relevant websites
2. Websites linking to your blog posts and web page links
3. Publicity features
78 Link Building Resources (2018 Update)