A blog on a subdomain has some specific SEO considerations worth understanding, since search engines can sometimes treat subdomains somewhat differently from subdirectories.
Understand the Tradeoffs of Your Chosen Structure
Subdomains and subdirectories each have some differing implications for how authority is understood across your site.
Maintain Consistent Branding and Navigation
A subdomain blog that feels disconnected from the main site can create a confusing experience for both visitors and search engines.
Cross-Link Between the Blog and Main Site Deliberately
Clear, deliberate linking between your subdomain blog and your primary site strengthens the overall relationship between them.
Next step: Use the SEO Audit to check how your subdomain blog's technical health compares to your primary site.