A key element of SEO for small businesses is building high-quality backlinks. Backlinks are links from other websites to your own, and they can help improve your website's visibility and credibility in the eyes of search engines. There are many ways to build backlinks, including guest blogging, broken link building, and creating valuable content that other websites will want to link to. Just be sure to avoid any unethical link-building tactics, as these can actually harm your SEO.