[NOVICE] PostgreSQL IN A WEB SITE

I am developing an ASP.NET web site in which I will use PostgreSQL and such a site is going to be hosted in a hosting company (not in my server).

 

All of the information will be processed through the ASP.NET application using ADO.NET.

 

Does the hosting company need to have PostgreSQL installed in its server(s)?

If not, is there an advantage if the hosting company has PostgreSQL installed?

 

Please advice !!!

 

Respectfully,

Jorge Maldonado