How do I create high-quality backlinks for my SEO marketing?

You need to work strategically to create high-quality backlinks. The foremost is the high-quality content creation that is valuable and relevant to your target audience. You need to create blog posts, infographics, and videos focusing more on quality than quantity, called linkable assets. 
In addition, reach out to your mentors or bloggers who are reputed in that field and request backlinks by showing you quality work. Who is valued in your field? You should also monitor your backlink profile to ensure high-quality and relevant links.