SEO keywords are not static, but dynamic and evolving, as they reflect the changes and trends in your niche and market, and the needs and expectations of your users. To keep up with the changes and trends in SEO keywords, you need to constantly monitor and update your keywords, according to the latest data and insights. You can use various tools and methods to keep up with the changes and trends in SEO keywords, such as keyword research tools, competitor analysis, user feedback, social media, etc. You should keep up with the changes and trends in SEO keywords regularly, and adapt and improve your keyword strategy and optimization accordingly.