Does having a different sub domain for your Landing Page and Blog affect your overall SEO benefits and Ranking?

[vinodh-spintadigital]

We have a domain www.spintadigital.com that is hosted with dreamhost and we also have a seperate subdomain blog.spintadigital.com which is hosted in the Ghost platform and we are also using Unbounce landing pages with the sub domain get.spintadigital.com.

I wanted to know whether having subdomain like this would affect the traffic metric and ineffect affect the SEO and Rankings of our site.  I think it does not affect the increase in domain authority, but in places like similar web i get different traffic metrics for the different domains.  As far as i can see in many of the metrics these are considered as seperate websites.  We are currently concentrating more on our blogs and wanted to make sure that it does help in the overall domain.

We do not have the bandwidth to promote three different websites, and hence need the community's help to understand what is the best option to take this forward.

[paints-n-design]

Every Subdomain is a domain with own Domain Autority. In general I would not use sub-domains - in a few special cases it is a good decision, but normally a sub-domain is a new domain starting at zero. I like Landing Pages and Blogs in subfolders wich helps a lot for the existing domains autority.
By the way, links from subdomains du other subdomain (www, etc) are treaded like internal links.

Q:whether having subdomain like this would affect the traffic metric and ineffect affect the SEO and Rankings of our site
A: It would be better if it's a subfolder, but yes it will affect in traffic and that allways could lead you to better rankings

Q: does not affect the increase in domain authority
A: correct

Q:considered as seperate websites
A: yep!

Q: wanted to make sure that it does help in the overall domain
A: Like I said in A one it would be better with a subfolder (special the blog) but it wont hurt you