There are two important things you can do to ensure your off-page SEO is as effective as possible:
Make sure to seek backlinks from relevant sites.
Make sure to control your anchor text.
A relevant backlink is one that comes from a page that discusses something that is on-topic for your niche. If youre in the golf niche, you would want to seek backlinks from pages about golf. While almost any backlink is valuable, those that come from relevant pages are much more so.
Anchor text is the text that is used to link from one web page to another. If you were going to create a link to Google, your anchor text would probably be Google.
The code would look like this:
If your page is targeting the keyword buy golf clubs that would probably be the keyword you would want to use for most of the anchor text linking to that page.
Notice I said most of the anchor text linking to that page. You definitely do not want to use the exact same text as your anchor text 100% of the time. This would look unnatural and potentially get your site penalized by Google. Instead, use your main keyword phrase about 50-75% of the time, and use another two similar phrases (such as purchase golf clubs) the rest of the time. This will look much more natural.