To increase the length of my last answer and avoid repeating myself, I can add more information about each of the steps involved in building topical authority for a website.

• Identify your target topics. When identifying your target topics, it is important to consider your business goals and your audience's needs. You should also consider the level of competition for each topic. Once you have identified a few potential target topics, you can use keyword research to learn more about each topic and to identify the keywords that people are searching for related to those topics.

• Do keyword research. Keyword research is essential for building topical authority because it helps you to identify the keywords that your target audience is using to search for information. You can use a variety of keyword research tools to find relevant keywords, such as Google Keyword Planner and Ahrefs Keywords Explorer. When choosing keywords, it is important to consider the search volume, competition, and relevance of each keyword.

• Create high-quality content. The best way to build topical authority is to create high-quality content that is relevant to your target topics. This content should be well-written, informative, and engaging. You should also make sure that your content is optimized for search engines. When optimizing your content for search engines, it is important to use relevant keywords in your title tags, meta descriptions, and throughout your content. You should also make sure that your content is mobile-friendly.

• Build backlinks to your website. Backlinks are links from other websites to your own. Backlinks are a signal to Google that your website is authoritative and trustworthy. You can build backlinks by creating high-quality content that other websites will want to link to, and by guest blogging on other websites in your industry. When guest blogging, it is important to choose websites that are relevant to your own website and that have a high domain authority.

• Promote your content. Once you have created high-quality content, you need to promote it so that people can find it. You can promote your content on social media, through email marketing, and by guest blogging on other websites. You can also promote your content by submitting it to directories and by running paid advertising campaigns.

In addition to the above steps, there are a few other things you can do to build topical authority for your website:

• Create a content calendar. A content calendar will help you to plan and publish your content on a regular basis. This is important because Google favors websites that publish fresh content on a regular basis.

• Use data to inform your content strategy. You can use data from analytics tools to see what content is performing well and what content is not performing well. This data can help you to create more of the content that your audience wants to see.

• Be patient. It takes time to build topical authority. Don't expect to see results overnight. Just keep creating high-quality content, building backlinks, and promoting your content, and you will eventually see results.

Building topical authority is an important part of any SEO strategy. By following the tips above, you can start to build topical authority for your website and improve your ranking in SERPs.