Some things to watch out for are Meta Tag Stuffing and Domain Spamming. Meta keyword tags can be a beneficial and generally viable way to increase web site traffic. However, if the keywords aren't clearly relevant to the topic on the page, some search engines will detect it and flag it as spam. Meta tags are typically done on client-side redirection. Avoiding Meta Tag Stuffing is yet another argument for server-side redirection.
Domain spamming typically is creating “mirror” sites with different web addresses solely to increase views and rankings. Therefore to keep from resembling a spammer, once a site has been redirected it should not continue to operate under two different domain names.
Keeping the previous tips in mind will allow a site's owner or manager to perform content redirection efficiently. It will also help the keep the redirection from looking like it was used for spamming users. The information may also help to negotiate content redirection with a web hosting service.