What is the difference between soft 404 and 404 errors?

[New Life]

Can you explain me please the difference between a soft 404 and simply a 404 error? Do they really affect in search rankings or bounce rate of a website?

 

[devidweb]

Hello
The error 404 page not found means that the page you are finding server can't find he page.
Soft 404 means page not found and user will move to either home page.

Thanks
Devid Web

 

[amphis software]

soft 404 means a missing page that is referenced from a link somewhere and followed by the search engine spider which probably isn't good for SEO

 

[Codefixer]

A soft 404 happens when a page that has been deleted or removed displays a ‘page not found’ message, but fails to return the correct HTTP 404 status.