I have a couple of queries. I have a domain and a subdomain for the same. I have a cool blog on that subdomain. However, now I intend to use my main domain to set up another blog. For your information, my domain is related to cosmetic products. I have a relevant keyword on the primary domain. I need to know if I can use my root domain for creating a blog having a different niche. What if I want to blog about cancer? Will it have a negative impact on my site? I donít want to face any SEO related issues.