Stumbleupon is a social media site where we can view,comment,share and post articles,images,links.It circles around a wide round of community with different category.Also it shows most of the recent trends.
Google plus is a very effective social media sites which acquires a large audience.Google plus becomes a support for the google search engine with its variety of shares,likes and promotes it.
Well Social Media sites have grown to reach a large number of audiences. In facebook creating a fan page lets to include a large number of people into the website or by branding the product,services.
Yes you can create groups in facebook. Also you can make the settings as closed so that people inside the group can view the posts and open group where the posts is visible to all the members of facebook.
Asp.net executes a lot faster when it comes to release mode.But then again you need a better configuration with good RAM in order to increase its speed of execution whereas php does executes faster and freshly too..
Well it depends upon the budget which your planning to set.If budget isn't a problem then you could go ahead with any of the high tech mobile introduced recently like iphone 5S,samsung galaxy S5,xperia Z2
A link which you get when you post in other websites is referred to as a backlink. Getting quality backlinks helps to increase the SERP of the keywords.
When comparing their features i would go for Viber, but some devices gets lagged by using it.Unlike Whatsapp which has very low size and is very fast.If he/she prefers calling options also, then he/she go for Viber as Whatsapp doesn't have the calling option.