If I was really traffic hungry I would post this in a Twitter thread ;)
In short, if you have a SaaS product and it's moderately boring, like mine sheet2api.com. Then create some FREE exciting/useful tools related in some way and share them around.
I added one which turns Wikipedia Article Tables into a functioning API: (https://sheet2api.com/tools/wiki-api/)
As you can see from the screenshot, this has driven a bunch of users to the website, and I guess some backlinks at some point.
Brand awareness, SEO juice, backlinks, all free.