This can be information such as the latest Stock Quotes, the latest Weather reports or pictures. Their business is specifically providing that information, files, software or service. A large percentage of Internet service providers allow an area for users to post a modest home pages for free. The normal restrictions would include the amount of harddrive space and traffic a page recieves. Normally the user would create their own home page and then using FTP move it to the designated area on the web server.
Some providers offer other services with home pages such as counters, statistics and guestbooks.
As the World Wide Web pages are normally a part of an Internet service providers business he is looking to make a resonable return for the computer resources, hardware, software and the time they have invested. Rates for personal home pages and business web pages vary from Internet service provider to service provider. Some providers will help you create them or offer infromation about software that will help your create them, insome cases they charge a modest fee to pay for their time.