Using ` symbol for concatenations in Angular 5

On a new project, I've seen that someone is doing a string concatenation in components using the ` symbol (ASCII 96 or grave accent symbol):

let a = `${this.SOME_CONSTANT}/some_string/${some_variable.some_property}`;


Is this considered a normal practice in Angular 5 instead of using normal plusses? Isn't this a template creation operation thus should work slower?

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