Can someone explain me the domain name with( - )or wighout (-)?

I am confuse now how to choose the domain name.
I don't know which is better for google ranking for the domain name with
example
www.keyword1keyowrd2.com or
www.keyowrd1-keyword2.com
if both are available which domain i should choose.
I have read many that i can use - between keywords and more than 3(-) is bad.
but i do not know which is good, with or without.
please help!

 

First option - keyword1keyboard2.com looks better.

 

If your keywords are short then use 1st one. If they are long then use 2nd one.

 

Thnaks for the reply. It really help me alot.

 

Hi Techncom,
how many word is called long word, ex (web, design, service) should i get webdesignservice.com or web-design-service.com?
Thanks

 

definitely www.keyword1keyowrd2.com that is more likely to be more seo friendly

webdesignservice.com as in google it would be seemed as a single word and the other one looks clean but it has more letters in it

 

All I can say is www.good-luck-with-that.com

To me sometimes it would be better to use one. Say if the last letter of your first word and the first letter of the next word are the same like belllivings.com or masssinner.com. They'd be better as bell-livings.com or mass-sinner.com but only on the human eye. And that's down to preference. Although when telling someone an address like that outloud most people would just say mass sinners dot com and wouldnt probably go mass dash sinners dot com? As far as effect on rankings go that all depends on the site itself but the closer the keyword relevancy the better.

I think competition on the dashes is low though

 

The first option is better. Avoid (-) from the domains.