How do you host websites in web?

You need a Web Hosting company. What will happen is you basically upload all of your website's files to the web host who 'put your files on the internet'.

I have used several web hosts such as Awardspace, Rackspace, 000webhost all of which are very cheap but I changed to Hosting 24 about a year ago who have since been pretty good with up time and customer service - have linked to them below for you.