How does Shakespeare make Shylock a memorable character?i want to look at the techniques he used and its impact on the audience. Cheers!

I don't know if this counts as techniques or not, but I
think there are two major ways in which Shylock is
memorable.

First, I think he's memorable for modern
audiences just because he's a Jew.  We are so interested in tolerance these days that it
is fascinating to see what someone from back then does with a "minority"
character.

Second, Shylock is a complicated character.  He
is not all good or all bad.  Instead, he is this interesting mix.  On the one hand he is
hateful and spiteful.  He wants to kill Antonio (or at least risk killing him) and will
not take no for an answer.  But at the same time he seems quite humane, as in his "do I
not bleed" speech.  So he is a contradictory character and that makes him
interesting.