A In depth Description:
Rank/Placement
01 title: Defines the title of a page. You must have a title element to produce a valid document and it must be placed within the head element.
02 samp: Sample. Defines sample output, from a computer program for example.
03 acronym: Defines an element that is made up of the first letters of the words of a phrase such as ?CSS?. The title attribute is generally used to specify the whole word or phrase that the abbreviation is referring to. An acronym is also an abbreviation, but an abbreviation is not necessarily an acronym.
04 linking to relevant pages: ?link from your webpage to someone else?s webpage on the subject? AND yes that means you can rank for a keyword without using it in your source , but it is often difficult to be competitive. Linking to other pages that rank for the terms you are tuning for is VERY strong in google?s equation right now.
05 a.href: Anchor. Primarily used as a hypertext link. The link can be to another page, a part of a page or any other location on the web.
06 p: A new Paragraph.
07 pre: Preformatted text. Text where the whitespace (that is normally discarded by other elements) is as much a part of the content as the rest of the text. Commonly used to display computer code because it maintains nesting indentations.
08 inside a textarea: A multi-row text area form element. The initial value of the text area can be placed in between the opening and closing tags.
09 kbd: Keyboard. Used to define text that should be typed in by the user.
10 caption: Defines a caption for a table. It must appear straight after the opening table tag and used only once.
11 small: b (bold), i (italic), tt (teletype), sub (subscript), sup (superscript), big, small and hr (horizontal rule) are all presentational tags. As such, their use should be avoided and CSS used instead.
12 code: Defines code (such as computer code).
13 strong: Strong emphasis.
14 sub
15 u: Underlying any text.
16 center: centering your text or images.
17 cite: Defines an in-line citation or reference to another source.
18 big
19 font: Any type of font.
20 bdo: Bi-directional text. Defines an element that has different directional content. This is usually used with languages that are read in a different direction to the default language. For example, if Hebrew were used in an English document, it would need to be defined as being read from right-to-left.
21 em
22 legend: Defines a caption for a fieldset. The element must appear directly after the opening fieldset tag.
23 button
24 table > thead > tr > td
25 abbr: Defines an element that is a shortened word or phrase, such as ?HTML?. The title attribute is generally used to specify the whole word or phrase that the abbreviation is referring to. An acronym is also an abbreviation, but an abbreviation is not necessarily an acronym. Note: The abbr tag is not recognised in Internet Explorer.
26 address: Defines contact information, such as an address or a signature.
27 blockquote: A large quotation. The content of a blockquote element must include block-level elements such as headings, lists, paragraphs or div?s.
28 caption
29 div
30 span: Used to group in-line HTML. span applies no meaning and is commonly used solely to apply CSS.
31 del: Deletion. Used to define an editorial deletion of content. Often used along with ins.
32 ul > li
33 strike
34 ins: Insertion. Used to define an editorial insertion of content. Often used along with del.
35 sup
36 dfn: Definition term. The title attribute is often used to describe the definition.
37 body: The main body of an HTML document where all of the content is placed. You must use this element and it should be used just once. It must start immediately after the closing head tag and end directly before the closing html tag.
38 tt
39 table > tr > td
40 dt: Definition term. Used in conjunction with dl to define a definition list and dd, to define the description linked with the term.
41 h1
42 i this is an ?i? example. which is similar to em.
43 s
44 h3
45 a
46 img.alt
47 select > option
48 object > param.name
49 object > param.value
50 input.value
51 (meta:keywords).content
52 (meta:description).content
53 (meta:author).content
54 URL
55 b: Similar to ?strong? here is an example
56 HTML comments