How to increase keywords without adding new pages?

I have a competitor who operates nationally, while we focus on a local area. When analyzing their performance, I noticed their keyword count keeps growing every month by 700-750, even though their blog and service pages remain the same. How can they increase keywords like this? Are there ways to increase targeted keywords without creating new pages?

You can buy backlinks.

Axl said:
You can buy backlinks.

Exactly. Your competitor is likely buying backlinks from high-authority sites. Either that or they have their own link network and know how to manage it well.

They might be using related phrases and semantic keywords. Backlinks can also help boost keyword rankings.

To grow keywords, target more keyword variations and make sure your internal linking is solid.

Another way is optimizing your existing content for long-tail keywords. Update older pages with related terms that people search for.

Check if they’re ranking for keywords related to featured snippets or FAQs. Adding those might help you too.