People swim in lido during the heatwave

What do you think the phrase 'You know?' implies in a conversation?

How does the use of rhetorical questions like 'You know?' affect the listener's engagement?

In what contexts might someone use the phrase 'You know?' and why?

What are some alternative phrases to 'You know?' that convey a similar meaning?

Can the phrase 'You know?' be considered a filler? Why or why not?