The small syntax upgrade that makes a massive difference in how you write strings. If you've written even a little bit of JavaScript, you've done string concatenation. You've jammed variables and text together with + signs, fought with quote marks, and probably ended up with something that looked like this: let name = " Pratham " ; let age = 22 ; let city = " Delhi " ; let intro = " Hi, my name is " + name + " . I am " + age + " years old and I live in " + city + " . " ; console . log ( intro ); Enter fullscreen mode Exit fullscreen mode It works. But look at it. Really look at it. Count the quotes. Count the + signs. Count the spaces you had to manually add. Now imagine this string is three lines long with six variables. Welcome to concatenation hell. Template literals fix all of this. They were introduced in ES6 (2015), and once I started using them in the ChaiCode Web Dev Cohort 2026, I genuinely couldn't go back. Let me show you why.…