Is it better to put hyphens in a domain name?
I would avoid hyphens in the domain name. While they are useful in the path for a file or post, they add unneeded noise to the domain itself. Imagine having to spell it out for someone..."stack dash overflow dot com" just doesn't sound right.
On the other hand, there are likely some domains where a well-placed hyphen would be beneficial. For example: expertsexchange can be read as expert sex change. A hyphen would make a big difference: experts-exchange.
In the end, it's up to you, but my instinct is to avoid hyphens in a domain name.
Domain name: No. (It’s not normal and is harder to remember. However, preference is okay. It doesn’t affect ranking.)
For example,
http://webmasters.stackexchange.com/questions/410/is-it-better-to-put-hyphens-in-a-domain-name
File Location in URL: Yes. (It’s easier for people to read.)
For example,
http: //webmasters.stackexchange.com/questions/410/is-it-better-to-put-hyphens-in-a-domain-name
Depends on your user-base: In Germany everyone would expect hyphens in domain names. In the English-speaking world you should probably avoid them:
- Nobody expects them there and mistypes
- There is no real right way to pronounce it.
On SEO perspective it doesn't matter. Both names rank the same.
And of course in doubt you should purchase both. Every user gets to the right site.