Google has created a single page where you can find all of the Google Search content policies. This includes Google Search’s overall content policies, search feature policies and feature specific policies. You can find them all in this one document here.

Here is an overview of these policies but if you want to read each one, go to the above document:

Overall content policies for Google Search:
Child sexual abuse imagery or exploitation material
Highly personal information
Spam
Webmaster & site owner requests
Valid legal requests

Search features policies:
s
Dangerous content
Deceptive practices
Harassing content
Hateful content
Manipulated media
Medical content
Regulated goods
Sexually explicit content
Terrorist content
Violence & gore
Vulgar language & profanity

Feature-specific policies:
Autocompletes
Dictionary boxes
Featured snippets
Google Discovers
Google News
Google Podcasts
Image & video boxes
Knowledge Graph & Knowledge Panels
Structured datas
Structured data for job postings
User content on Search

I learned this news from John Mueller’s news update video at the 6:56 mark where he said “we recently launched a shared location for all content policies around search. This should make it easier for you to find any specific policy that you’re looking for.”

Forum discussion at Twitter.