We have several domains with the names of products we sell. The idea is to create mini sites in the future that specialize just in those products, mainly for better placement on SE results pages. As of now, none of these websites have any content, and it doesn't look like we will be adding any for a while.
For example, website productA1.com
If i redirect that website to mainwebsite.com/productA1/ will, will productA1.com be indexed by search engines? In other words, will it be displayed on Search engines as a result (productA1.com)? If so, should i use 301 or 302 redirect?
Or is the best option to upload that one html page from my mainwebsite.com to productA1.com?
I don't want to point any of them to the main root of my main website, only to the appropriate product categories.
I just found a competitor that ranks #1 for a product we also sell, and that page (I'm not sure if entirely, but i believe so) is redirected to their main website/category but the address is masked. Which is exactly what I'm looking for, ranking up there with the keyword based website.
Edit: I found out that the competitor uses an iframe that renders in 100% of the page, and the iframe displays mainwebsite.com/productA1/ Is that the best practice?