HTML for SEO

HTML plays a big role in how your webpages are seen by people and search engine spiders. There are a few helpful tips in understanding what to do to get your HTML up to par so that it's crawled properly and ranked highly in search engines.

Write a clear title

Should contain the main keyword for the page, followed by a brief description of the page content
Should be less than 65 characters
Avoid using stop words such as: a, am, an, and, are, as, at, be, by, com, de, en, for, from, how, in, is, it, la, of, on, or, that, the, this, to, was, what, when, where, who, will, with, www, we, you, your, me, mine, my, i
Your title tag should also be limited to the use of alphanumeric characters, hyphens, and commas

Write a helpful description

Should contain information about the page's content and persuade search engine users to visit your web site
Between 25 and 35 words in length
Find keywords with Google Keyword Planner

Add meta keywords

Should contain between 5-10 keywords or keyword phrases that are also found in page content.

Use an H1 heading

Should use at least one H1 heading tag for the search engines that examine it when scanning your site.

Write enough content

Pages must have 300 words.

Link your pages together

Each page of your site should contain links to every other page so search engine spiders can find every page. This helps search engines find and index every page.

Add sitemaps

It's important to use two site maps for your website--an XML version and a static version. The XML version can be created with search engine visibility's site map tool. The static version should sit on a static HTML page and contain links to every other page.

Add a robots.txt file

It's important that search engine spiders find your robots.txt file that guides spiders to pages and directories you want scanned and denies entry to protected areas of your site.

Make Content Unique

Because search engines treat web sites as a grouping of pages and not a single entity, each page on your site should be unique so that the tags and content differ between each page. Doing so increases the number of pages that will rank.

Proper Image Tag (Alt)

Each page should include a relevant image with a roper image tag. This makes your page more visually appealing and enables search engines to catalog the image.
If an image cannot be displayed (wrong src, slow connection, etc), the alt attribute provides alternative information. Using keywords and human-readable captions in the alt attributes is a good SEO practice because search engines cannot realy see the images. For images with a decorative role (bullets, round corners, etc) you are advised to use an empty alt or a CSS background image.

Limit HTTP Requests

Your page must have no more than 20 http requests. You can try reducing http requests through various methods such as using text instead of images, using css sprites, using data URIs instead of images, or combining several external files together into one.

Recommended Page Size

Recommended page size is under 33 Kb. This leads to a faster page loading time than average.

Don't use underscores in URL

Check your URL and in-page URLs for underscore characters. The general advise is to use hyphens or dashes (-) rather than underscores (_). Google treats hyphens as separators between words in a URL – unlike underscores.

Make a Fan Page in Social Media

Check if your page is connected to at least one of the most important social networks. Social signals are getting increasing importance as ranking factors for search engines because it leverages the social intelligence (via our interactions) to determine more accurate relevancy for searches. That's why connecting your website to a social network is a must nowadays to make sure your site is social enabled.

You can also use this tool to quickly scan your website

By SEO Site Checkup

Check out this tool