Search engines use keywords entered by users to find websites containing relevant information. Key strategies for improving search engine optimization (SEO) include optimizing on-page factors like titles, headers, images, and content as well as off-page factors like links and anchor text. Keyword research is important to identify the best keywords for a website to target to increase search traffic. Tools can help with tasks like keyword discovery, tracking rankings, and analyzing page optimization. Mobile compatibility is becoming increasingly important for SEO success. With proper optimization over time, websites can improve their search engine rankings.