What does ` mean?

[tokugawaieneko]

I just started with the tutorial materials " Building Neo4j Applications with Python".
There is a query in "Interacting with Neo4j" -> "The Homepage" that I found hard to understand.
Where does "sort", "order" inside the format() go?
What's is the purpose of the ` enveloping {0} and WHERE statement?
What's the difference between the usage of that tilted apostrophe and ' in Neo4j query?

[multshibanda]

{0} must be replaced by a movies property ex: m.title

[tokugawaieneko]

Thank you for answering.
I attached a screenshot.
Could you tell me where does "sort", "order" inside the format() go?
What's is the purpose of ` enveloping {0} at the WHERE statement?