I have a client who wants to use multiple TDL's for one site. For example they want to use http://mywebsite.com http://mywebsite.info http://mywebsite.us http://mywebsite.asia http://mywebsite.eu but I'm afraid it will be against Googles indexing policies and they SERP will suffer. I instead reccomended doing something like http://mywebsite.com http://info.mywebsite.com http://us.mywebsite.com http://asia.mywebsite.com Am I correct in my thinking? If so, why?
Yes this is against googles policy unless it is the same extension. Read this for more clarification. http://howtomakemoneyovertheinterne...imization-seo-old-tricks-that-no-longer-work/
definitely your serp will be effected by above action its better if you can create sub domain instead of creating different TLD.
if all domains have same contents then its going to be a problem.. google just going to penalized or worst ban your those sites..
Your client should own the other TLDs but should not use them. Do not use sub-domains either (as you recommend). Either approach will likely result in duplicate content penalties and the main site may be the one that gets hurt most. The answer is don't use duplicate sites. If the purpose is to offer content in alternative languages then use mysite.com/en, mysite.com/fr, mysite.com/sp, mysite.com/ch and so on with a language drop down menu (or similar) at the top of the page.
as saqib is saying if your client wants to buy those domains then make them as addon domains and redirect them on a single .com domain
Your client can buy those domains but i think it is better to concentrate on a single extension like .com. This will make it easy for you to optimize. It's difficult to manage all sites.
i think your client should develop only one domain and do a 301 redirect of others to this main domain
Yeah, I'd let the client know that that sort of thing will only hurt him. Like others have said, having the same extension for all of them should be okay by Google's policy.