A sharp increase in "internal transitions" on the site, what can this mean?

Question

Search Engine Optimization

Search traffic and direct hits fell, while internal clicks increased in exactly proportion.
What can it say?

Answer 1

The advertising script was removed and the situation returned to normal. Most likely, it somehow worked incorrectly and because of this something terrible happened. What exactly - it will be necessary to find out somehow.

This is a banal parsing of your site through client-side ajax, which is called by this script. I would no longer work with such services doing this...

Answer 2

Due to the absence of the left part, the "size of the jump" is not clear. In general - to build several reports according to different criteria in a given period of time in order to narrow the circle and leave only clients with the same parameters. And from them it will be clear what kind of jump it is.
Of the options: you added a "pack" of new products to the site -> they were parsed ...