This is a couple of years old but still should help you out.

How to create a social network app on Android - Stack ...

stackoverflow.com/.../how-to-create-a-social-network-app-on-android

It depends on what you want and if you're using a company the cost might affect your choice too. Personally, I like www.weebly.com because its simple to use and free but you can purchase an upgrade which gives you access to some additional features.

If you are going to promote you business then a website is a must. I think yhese points will sure help you in terms of find a right web service provider -
Know your bottom line
Know your cost vs. Value
Identify a solid track record
Know what you want to achieve, be realistic
Know your strategy
Maintain the quality of … Read more