SEO | Selection of Domain Names

Even when choosing a domain name you should have to care about the search engine optimization. This does not apply for valuable and big names (brands) which are already in Google's index.
For example, a shop which is selling chicken and eggs in local market should choose the domain name which tell the users what it sells and in which area. 

Example: chickeninfranfurt.de

It has been proven to be useful to registers two domains, An SEO friendly domain with 1,2 keywords and another a simple one for emails.
For Example: chicken-eggs-frankfurt.de and another egg-frankfurt.de and redirecting this domain to other domain which is SEO optimized.