“Mobile site or not - it doesn't matter”
With the update Mobilegeddon introduced in 2015, mobile-adapted pages began to be rewarded significantly compared to those without mobile adaptation. As in most examples, user-friendliness and having respect for your website's visitors is, according to Google, a must. Mobile matters more in 2019 than ever.
Obtaining links is bad for your SEO
Obtaining links does not mean that it is bad for your SEO and that you would be penalized for it. On the contrary, it is relevant links from good websites, it could affect your ranking positively. There are many ways to get links that definitely do not have to be bad or especially risky. It may be that links from, for example, partners, suppliers or customers are very relevant and positive for your e-commerce visibility.
All links are good links
Hand in hand with this is that all links are better than no links is also a common myth. If you have a lot of low quality links from websites that are not relevant, it can very likely affect your SEO and ranking negatively. While Google is good at ignoring bad links, you shouldn't think all links are good links. Links from, for example, blog comments, the footer of a website, or the like, are usually bad links and will not make your SEO better. In the worst case, it will adversely affect your website and rankings. Instead, try to get links of high relevance where you get a link directly to the content from, for example, an article.
You have to ask Google to ignore bad links to your site
Historically, you have had to attach a so-called Disavow file to Google Search Console to tell Google which links you want to reject, and that Google should ignore them. Over time, Google itself has become better at figuring out if a link is good, or bad, and can usually ignore these spam links without the need to attach a Disavow file. That said, there may still be some cases when you need to use Disavow in Google Search Console, if there is a very large amount of bad links, or you actually see that you may have lost in the rankings, due to bad links.