Chuckles. Since the advent of nofollow's rise at g's request, the value of any links has been drastically reduced.
Reality is SOME links from Very Major Sites might have a temporary benefit, but none are long lasting and you can't build a site/business on that. After all, users are a fickle bunch flitting about like a bee from one flower to the next...
SEO proclaimers will say backlinks are essential. In real life the only links that matter are the ones that bring traffic to your door ... and increasingly that is from the search engines and not from other sites, who have all been frightened to death to mark those as NOFOLLOW (thus you never had a "juice link" in the first place.
Put your time into the site, content, and other forms of marketing!
Backlinks is one of the best Google ranking factor. But backlinks must be high quality and powerful. If you have high domain authority seo backlinks then you will get green ranking signal. If you have many backlinks then it's good that you have many referring domains and search engine follow that which websites refer of your website. So backlinks are must for website ranking but be careful SPAM links are harmful for website.
The two most important things that Google looks at for ranking are content and backlinks. So yes, links pointing to your domain matter. However, the first step is to create great content. After that, it's about promoting your content. There are many different ways of doing so and if you do a good job, some people will naturally link to you. After that, engaging in some real link building is likely beneficial.