Subdomains are often created in connection with landing pages.
In my opinion, this is a rather questionable method for SEO, and for the following reason:
The subdomain is treated like its own domain by Google.
One of the many important factors in SEO optimisation is to increase the volume of the main page. Creating subdomains reduces the volume of the main page. Therefore, I advise against it.
It is better to position the landing page in a subfolder. If necessary, the content can be expanded, giving the website more volume. Furthermore, search engines are not „stressed“ by new domains. Keep your website structure clear and simple. This makes it easy for search engines to index your site. If you publish content regularly, you will quickly achieve good positioning.
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