Some notes about managing to access a table in Network

I have some databases is a one connection. I want put my database in internet to have a network connection so there are some users have access to my database at a same time.

I have some questions about it.

1- Should I manage my tables or database when my users want to edit data at a same time , Or sql will manage it?

2-While I set my database as a Multi-User, Will my database splited like this article Split Database 

3- Is there some thing else for have a network connection that I should mention it?

and I know my database should be set as "Online"

I read this article too: Multiuser Access

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