The content on your home page is controlled in “Appearance —> xxx Theme Options.” (xxx is replaced by your specific theme’s name).
The settings for the home page can be found under the “General Settings” menu, under the “Homepage” tab.
You should not change any settings unless you have an understanding of what you are doing. There is a link to support documents for your specific theme under the “Support Docs” menu. Use this documentation and its tutorials to learn how to change any of the theme’s settings.