Established in the external style. Faster pages. You can change the styles without editing the main css file. Ideal for dynamic styles. Useful for sending emails in html format. On the contrary, it has the following disadvantages : excessive use of styles in a multitude of tags will make the page take up more space and consequently increase the loading time. Maintenance and styling changes become more complicated. Importing existing style sheet files another cool way to include css in html is with the @import rule . This rule allows us to attach a new css file from the css itself.