What makes it a "slide left"?

What makes it a "slide left"?
by NJND96 (2019-01-11 09:46:10)

In reply to: sorry to keep replying to myself here, but there is a scheme posted by jt

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I'm looking to be educated here, I don't see any noticeable shifting with the OL in their blocking.

Replies:

the LG, C, RG, and LT slide one gap to their left - jt 2019-01-11 10:05:25
- Wow, just looked like they were blocking their man - NJND96 2019-01-11 13:41:58
  - the other view that I've seen is from behind the qb - jt 2019-01-11 16:04:57