Interpolation allows us to include expressions as part of any string literal, which we use in our HTML. The angular evaluates the expressions into a string and replaces it in the original string and updates the view.
You can use interpolation wherever you use a string literal in the view. Angular interpolation is also known by the name string interpolation. Because you incorporate expressions inside another string. Interpolation is one way as values go from the component to the template. When the component values change, the Angular updates the view. But if the values change in the view, components are not updated.
The Angular uses the {{ }} (double curly braces) in the template to denote the interpolation. The syntax is as shown below
{{ templateExpression }}