Riddle me this Limerick

As I type to you, my dear reader,

I couldn't find something much sweeter.

than to give a limerick

just to give you a kick.

but make sure you aren't a cheater

For what I have today is nothing

but riddles that we are discussing

to strengthen your brain

for brain cells to gain

while the rest of the world is fussing

I give you these riddles to learn

and to whomever this may concern

please gather your courage

please don't be discouraged.

for learning should not cause any burns

so riddle me this: who reads this list

Item exists to only assist

it talks but not talks back

sometimes slow but not slack

uses your wifi to give you lists

What am I?