Utilize existing memberships
Next, you will start to reach out to the site owner and key influencers. It's not your intention to ask them for a link to your page about X. That would be too direct and heavy-handed. Instead, try a subtler approach. Write to the person to alert them about your content. Ask if they would be willing to share it with their followers, just like they have with similar content.
One of the best ways for backlinks to be built is by building relationships. People won't link to your site if they don't know you.
Google will also notice if you are active in these social media platforms and you post content on a regular basis to your website. This will be a positive for your SEO strategy.
If you're considering buying promotion, statistically this could actually benefit your backlink strategies.