I've just install SQL Server 2017, it showed this window:
When I open SQL Server Management Studio it has default Server Name as
DESKTOP-6ECNPU1\matt which is the SQL Administrator value of the server. I'm confused because I thought the value that would be needed is the Instance Name
MSSQLSERVER. I have connected to the database but I'm not sure if it's the right one,
DESKTOP-6ECNPU1\matt could be a previously installed SQL Server that came with Visual Studio. So my question, have I connected to the SQL Server I just installed?