1-Limiting the formatting possibilities that your pages require.
You can use tags like , , and <font> to change the appearance of text and use attributes like bgcolor to change the background color of HTML elements. You also have a number of other attributes at your disposal for changing the way links appear in your page.2-Data and presentation are mixed within the same file
<font face=”Arial” color=”red” size=”+1”> </font>
3- HTML doesn’t allow you to easily switch formatting at runtime in the browser.
Difficult change the formatting at runtime in the user’s browser. There is no way to let your visitor change things like the font size or color.
4-The required formatting tags and attributes make your pages larger and thus slower to load and display. This makes it slower to download and display because the information
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