Search Engine Optimization (SEO)

Domain

• use a speaking URL
• differanciate between subdomain and subdirectory

Title

• every page shound have a unique speaking title (60 - 100 characters)

<title>Website Title goes here</title>

Keywords

• select specific keywords
• every page shound have unique keywords
• max. 10 keywords

<meta name="keywords" content="10 words">

Description

• every page shound have a unique description
• max. 160 characters

<meta name="description" content="max 160 Chars">

Content

• Content matters the most
• Page Title should appear 3% of content length
• add ~ 3 internal links
• use strong tag
• do not provide duplicated content
• article should be at least 300 words

Headings

• Clear structure H1 - H6

Images

• Alt tag (60 - 70 characters)
• Use a CDN or a subdomain to allow parallal http-requests

Links

• add meaningful title
• Only add external links if you got a backlink to your site

Social Media

• Social link rank up your site

• use social snippets OpenGraph, Facebook, Twitter

• Authorship information

  <link rel="author" href="https://plus.google.com/u/0/[GOOGLE+ ID]">

  <a href="https://plus.google.com/u/0/[GOOGLE+ ID]?rel=author">Google</a>

• social profiles

  <span itemscope itemtype="http://schema.org/Organization">
    <link itemprop="url" href="http://www.your-company-site.com">
    <a itemprop="sameAs" href="http://www.facebook.com/your-company">Facebook</a>
    <a itemprop="sameAs" href="http://www.twitter.com/YourCompany">Twitter</a>
  </span>
  

Sitemap

• provide a .xml sitemap

Errors and access

• provide 403 - Acced denied page
• provide 404 - Page not found page
• add a robots.txt file
• Avoid FILE_NOT_FOUND errors

HTAccess

• enable GZip
• enable caching

Performance

• Performance and loading time matters
• only serve concatenated and minified files
• if possible no redirects
• compress images (ImageOptim)

UX

• User friendly site
• clickable links should not be too small

Mobile

• add viewport tag

 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0">

• create a mobile-friendly site (shown in search results)
• Mobile-Friendly Test

Validation and accessibility

• Write valid markup (HTML Validator CSS Validator)
• use WAI-Aria tags
• use RichSnippets

Security

• HTTPS as a ranking signal

Search

• Provide a custom search (schema.org/SearchAction, RichSnippet)

Tools

• Google Webmasters
• Bing Webmasters
• Google Analytics
• PageSpeed Insights
• AdWords Keyword Tool
• Google Trends
• Structured Data Testing Tool
• Google+ Snippet Creator
• seo tool by feedthebot
• Facebook Debugger