Link text is the visible text inside a link. This text tells users and Google something about the page you're linking to. Links on your page may be internal—pointing to other pages on your site—or external—leading to content on other sites. In either of these cases, the better your anchor text is, the easier it is for users to navigate and for Google to understand what the page you're linking to is about.
A quick search for “SEO ranking factors” will give you all of these answers and myriad others. There is a lot of information out there. And the reality is, while there are likely hundreds of variables working together to determine final placement, much of what is suggested is guesswork. And certainly, not all ranking factors are relevant to every business.
In the real world, its not so easy. For example, I have 2 niches where I’m trying to use your technique. By keywords, its Software for Moving and Free Moving Quotes. I have 2 websites that related to each of them, emoversoftware.com (emover-software.com as initial, they linked together) and RealMoving.com ( for latter keyword). So, to begin with, none of those niches has Wikipedia articles, so your first suggestion will not work. But, in general suggestions, you are advising to get backlinks (of authoritative sites of course). But check this out – my site emover-software.com has only 4(!) backlinks (https://openlinkprofiler.org/r/emover-software.com#.VXTaOs9VhBc) and, however, listed as #1 (or #2) by my keyword. (moving software, software for moving, software for moving company). RealMoving.com has more than 600 backlinks and is way back in ranks ( 170 and up) by my keyword. Even though those sites have different competition, its still makes no sense! It doesn’t seem like Google even cares about your backlinks at all! I also checked one of my competitor’s backlinks, its more than 12000, however, his rank by keyword related to moving quotes even worse than mine!.
Social media is one of the most popular free marketing tools around, and plays a role in driving traffic to your website. Use Facebook, Instagram, and LinkedIn to promote blog posts and other useful pages on your website. This way you can turn your social media audience into website visitors, and draw traffic from their networks if you post shareable content.