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In the previous video, we learned about semantic HTML such as what semantic tags are and why it is important to use it In this video we will discuss id and class attributes in HTML. These two attributes are referred as the element selector and are used to identify an element based on the name assigned to these parameters. First, what the id and class attributes are Second, when to use each attribute focusing on their differences. The id attribute is used to specify a unique id for an element. Only one id selector can be attached to an element. In other words, you cannot have more than one element with the same id in HTML file. So the id is unique in a page and can only be applied to only one element. The class attribute is used to specify a class for an element. It means we can group one or more elements by assigning class names. Multiple class selectors can be attached to one HTML element and also vice versa. A class can be applied to multiple elements so it could be used multiple tim