I was in adwords two years ago and failed. I have decided to try again. I just have a few questions. I am seeing that you need a landing page. Does the landing page need to be on a related product website or can I use my existing webpage and just create a landing page for the product?
Your landing page should reflect what you are advertising in your PPC ad. This is important because the relevance of your landing page affects your quality score which determines your minimum bid and ad position. Here's some landing page tips and then how to improve your quality score. Good luck.
How about a "generic domain name"? For example: generic-domain.com/product-x generic-domain.com/product-y Is it feasible?
The domain name doesn't really matter except in regard to the display URL. Obviously, it will likely help your CTR if you have the product name in your domain because it will be one more bolded term. When it comes to landing page quality, it's all about the relevance between the landing page content, ad copy and keyword.
Landing page should be a page on the website and should be designed essentially to match the ads that you create. You should have an indicative list of products and their cost that you may have used in your advert. It should be catchy enough to compell the visitors to browse through other descriptive pages on your website. you can have a dynamic landing page that gets customized as per the various adverts. feel free to ask more on this