Here are some tips to improve SEO for your WordPress.com blog:

1. Choose a SEO-friendly theme: WordPress.com has many themes that are optimized for search engines. Choose a theme that is responsive, fast, and has a clean code structure.
2. Use a SEO plugin: Install and activate a SEO plugin such as Yoast SEO or All in One SEO Pack. These plugins will help you optimize your blog posts for search engines by giving you suggestions for keywords, meta descriptions, and other SEO elements.
3. Research and use relevant keywords: Conduct keyword research to find out what your target audience is searching for. Use these keywords in your blog posts, titles, headings, and meta descriptions.
4. Create high-quality content: Create content that is informative, engaging, and valuable to your target audience. Use visuals, videos, and other multimedia to enhance the user experience.
5. Optimize your images: Optimize your images by compressing them, adding alt text, and using descriptive file names. This will improve your blog’s load time and help search engines understand your content.
6. Build internal and external links: Link to your own content within your blog posts, and also link to external sources that provide additional value to your readers. This will help search engines understand the relevance of your content.
7. Promote your blog: Promote your blog on social media, forums, and other platforms. The more exposure your blog gets, the more likely it is to attract backlinks and improve its search engine ranking.

By following these tips, you can improve your WordPress.com blog’s SEO and attract more organic traffic to your website.