Do the Know Your Source tutorial before learning about the Chicago Manual of Style. Knowing what kind of source you need to cite is a skill to master before learning about any citation style.
The Chicago Manual of Style tutorial will guide you through the basics of using the Chicago Manual of Style.
To learn how to cite non-standard types of sources, watch a short video about Chapter 14 of the Chicago Manual of Style.
See the Chicago Manual of Style Citation Quick Guides for:
Notes and Bibliography format
Author-Date format
View this short video (7:26) to learn how to use the Chicago Manual of Style Online to cite primary sources.
Use the Chicago Manual of Style to find out how to properly cite web sites. See Chapter 14.205 "Websites, Blogs, and Social Media."
BUT...
... The Chicago Manual of Style specifies that web content is "...original content from online sources other than the types of formally published documents..."
SO..
... you need to figure out if the web content in question exists (or existed) as a formally published document. If so, then use the citation format for that type of content.