Topical authority refers to a website’s expertise and credibility on a specific subject. Building topical authority is important for SEO because it improves search performance and fosters trust from search engines and users. Topical authority can be gained by consistently creating high-quality, relevant content that incorporates relevant keywords, is easily readable, and resonates with searchers. Google prioritizes content creators with topical authority, as seen in algorithm updates and guidelines. To build topical authority, businesses should choose a niche, conduct keyword research, and plan link building strategies.

source: How to Build Topical Authority (and Why it Matters)