Hello Everyone,
I am fairly new to web design so please accept my apologies if I ask a stupid question.

This is regarding websites such as site.website.com.

1. Is site.website.com a different site from website.com?

example - I own website.com that sells various products. Can I seperate out the products to pets.website.com, outdoor.website.com, indoor.website.com, etc.?

Reason being - I have so many products that I sell on website.com that I really feel having "featured" sites that promote specific products would help sales, but I still need all my customers to understand they are still buying from website.com.

2. What do you call this?

3. How do you go about doing this?

4. Would it really help my business?

You can tell from my name what my company is, please feel free to check out my site and let me know if you think this idea I have might work.

Thanks