HTML tags are the building blocks of web pages. They are used to define the structure, content, and appearance of a web site. HTML tags are enclosed in angle brackets (< and >) and usually come in pairs, with a start tag and an end tag. For example,

...

Some of the important HTML tags for web site design are:

• <!DOCTYPE>: Defines the document type and version of HTML. It is the first line of an HTML document and tells the browser how to interpret the page. For example, declares that the document is in HTML5.

• : Defines the root element of an HTML document. It contains the and elements that hold the metadata and content of the page. For example, specifies that the language of the document is English.

• : Defines the head section of an HTML document. It contains information about the document, such as the title, meta tags, links to stylesheets and scripts, etc. For example, My Web Site defines the title of the document that appears in the browser tab.

• : Defines the body section of an HTML document. It contains the visible content of the page, such as headings, paragraphs, images, tables, forms, etc. For example, Welcome to My Web Site defines a level-one heading.

• : Defines a division or a section of an HTML document. It is used to group related elements together and apply styles or scripts to them. For example, ... defines a division with an id attribute of "header".

• : Defines a span of text within an HTML document. It is used to apply styles or scripts to a part of the text without changing its semantic meaning. For example, This text is red defines a span of text with a red color.

• : Defines a hyperlink that links to another document or location within the same document. It has an href attribute that specifies the URL of the destination. For example, W3Schools defines a hyperlink to W3Schools website.

• : Defines an image that is embedded in an HTML document. It has a src attribute that specifies the URL of the image source. It also has an alt attribute that provides alternative text for the image in case it cannot be displayed. For example, defines an image with a logo.

• and : Define unordered and ordered lists of items in an HTML document. They contain elements that define each list item. For example, AppleBananaCherry defines an unordered list of fruits.

• : Defines a table of data in an HTML document. It contains elements that define each table row, elements that define each table header, and elements that define each table cell. For example, NameAgeAlice25Bob30 defines a table of names and ages.

• : Defines a form that collects user input in an HTML document. It has an action attribute that specifies the URL of the server-side script that processes the form data. It also has a method attribute that specifies the HTTP method to use when submitting the form data. For example, ... defines a form that sends the data to submit.php using the POST method.

• : Defines an input field that allows the user to enter data in an HTML form. It has a type attribute that specifies the type of input, such as text, password, checkbox, radio, button, etc. It also has a name attribute that specifies the name of the input field. For example, defines a text input field with a name of "username".

• : Defines a label for an input field in an HTML form. It has a for attribute that specifies the id of the input field that it is associated with. For example, Username: defines a label for the input field with an id of "username".

• : Defines a drop-down list of options in an HTML form. It contains elements that define each option in the list. For example, RedGreenBlue defines a drop-down list of colors.

• : Defines a clickable button in an HTML document. It can contain text or an image. It can also have a type attribute that specifies the type of button, such as submit, reset, or button. For example, Submit defines a button that submits the form data.