I like subdomains. I think it's cool to have sites with URLs like mycar.debayo.com or myhouse.debayo.com and something like that. What I don't understand is why Google treats subdomains as separate sites. I mean, if traffic goes up in mycar.debayo.com this does not affect the SEO of debayo.com. Why is that? Are they indeed separate sites with different IP addresses?
You already answered your question. You should use folders if you want only 1 site. Examples: debayo.com/myhouse/...html debayo.com/mycar/...html
Right. If you don't use folders then they denote as separate sites and you have to seo for each one. But if you use folders then this problem will resolve. Just do seo for one site and automatically got everyone.
Google said some time ago that they treat subdomains as part of one site, but the reality is different. Not sure why, but it's not the IP address as in most cases subdomains tend to be using the same IP address as the main site.