What can cause bounce rates to skyrocket?

Question

Google Analytics

On one content resource (collective blog) last Thursday in Analytex, the bounce rate increased sharply. (always been around 4%, and now 65%, already for 5 days!). Moreover, it has grown in almost all popular materials at the moment. Because of what it can be? The site opens normally, there seems to be no DDoS.
The most interesting thing is that nothing has changed in Y.Metrika!

Answer 1

Nikita, you need to segment traffic by channels (search, advertising, direct traffic, referrals, etc.) and see which of them has increased bounces. and proceeding from this to dig further.