What is the cleanest way to build multi-line strings?

As the title mentions, what do you all think is the cleanest way to build an multi-line string.

For example, what if I want to define a function that builds a multiline string that looks like the following:

Your groups:
Group1
Group2

Here are examples of ways I was considering accomplishing this: (The function in the example is necessary to show how strange the indentation in code will look for template strings)

function doSomething() {
  const text = 'Your groups:'
    + '\nGroup1'
    + '\nGroup2';
  return text;
}

vs

// Subsequent lines in the string have no indent in code because we don't want indents in the string
function doSomething() {
  const text = `Your groups:
Group1
Group2`;
  return text;
}

[chrisngobanh]

Another example is putting the strings into an array and then joining:

function doSomething() {
  const text = ['Your groups', 'Group1', 'Group2'].join('\n');
  return text;
}

[shubhamAsolkar22]

Use ES6 template literals where strings are started and ended with ` symbol.

`hello 
world`

is equivalent to … "hello \nworld"