Many books and websites will tell you that “é” is pronounced like the English “ay”, as in “say” or “way”.
There's just one problem with this piece of advice: it's wrong. Sure, the “ay” sound is close to the French “é” sound, but it's not quite the same. If you pronounce “é” like an “ay”, it will be a dead giveaway that your native language is English.
To understand how “é” is pronounced, let's examine the English “ay” sound a little closer.
Try saying “say” or “way” very slowly, drawing out the vowel at the end. Notice that as you say “aaaaaay”, your tongue moves.This is because “ay” is secretly not one but two vowels said in quick succession. (Linguists call such double vowels “diphthongs”.)
The French “é” is the first of the two vowel sounds that make up the English “ay” diphthong. To pronounce “é” accurately, position your tongue like you're about to say “ay”, but once you start making noise, don't move your tongue or lips. Keep them steady for the entire duration of the sound.
Interestingly native German speakers can say it correctly as the same sound exists in German (obviously not é but just e)