Hi,

depend about your goal. Both are good but different. Pls give us more info.

I like to prefer Google Plus because it's Google's Product and It improves our website's Google Ranking too.

Both are very good.

Google+ is better site in my point of view

Both the social networking sites have their own importance. It is hard to tell as to which the best choice for website promotion related activities is.

Google+ is certainly a platform that is going to help you with your page rank. But Twitter can be used to drive in more traffic.

Google+ provides back links but, twitter not. Twitter is to reach people with short period by who are all watch your tweet.

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I use google and twitter for different reasons, so not sure how to compare them.

Google+ is better then twitter for SEO and traffic
Twitter is effective if you have a huge numbers of followers

Both of them has its own advantage Google + is really good for promotional purpose and does add advantage to you seo efforts but where as twitter is more about sharing information.

Both are best and effective but Google Plus is more.

Google+ is a product of Google search engine and it is better then twitter and other social medias. It is very easy to make more friends or followers at this plat form because you have no need to wait for approval of your friend request or following.

Google+ has more advantage then twitter
so my vote goes to Google+

Google plus is the most popular form my point of view as compared to twitter.