Your title should contain between 10 and 70 characters (spaces included).

Make sure your title is explicit and contains your most important keywords.

Be sure that each page has a unique title.

Resource: Use this snippet-optimizer to see how your titles and descriptions will look in Google™ search results.

Your meta description should contain between 70 and 160 characters (spaces included).

Meta descriptions allow you to influence how your web pages are described and displayed in search results. A good description acts as a potential organic advertisement and encourages the viewer to click through to your site.

Ensure that your meta description is explicit and contains your most important keywords. Also, each page should have a unique meta description relevant to the content of that page.

Your website does not use HTML headings (<H1> to <H6>) or it has far too many HTML headings.

Use your keywords in the headings and make sure the first level (<H1>) includes your most important keywords.

For more effective SEO, use only one <H1> tag per page.

Good, most or all of your images have alternative text (the alt attribute).

‬‬Alternative text describes your images so they can appear in Google™ Images search results.

This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.

A ratio between 25 and 70 percent is ideal. When it goes beyond that, the page might run the risk of being considered spam.

As long as the ‪‬‬content is relevant and gives essential information, it is a plus to have more of it.

This is the number of pages on your website that are indexed by search engines. The more pages that are indexed, the better, as this offers more opportunity for your website to be found.

A low number (relative to the total number of pages/URLs on your website) probably indicates that your internal link architecture needs improvement and is preventing search engines from crawling all of the pages on your website. You might want to create/check your site's XML sitemap and submit it to the major search engines. You must also build backlinks to your site's internal pages to help search bots crawl and index your web pages.

Check Google™ Webmaster Tools under Health and Index Status, to keep track of the status of your site's indexed pages.

Backlinks are links that point to your website from other websites. They are like letters of recommendation for your site.

Since this factor is crucial to SEO, you should have a strategy to improve the quantity and quality of backlinks.

Be careful, your server IP is not forwarding to your website's domain name. Search engines like Google™ are now able to index your website with its IP instead of its domain name. This will result in duplicate content.

To check this for your website, enter your IP address in the browser and see if your site loads with the IP address. Ideally, the IP should redirect to your website's URL or to a page from your website hosting provider.

If it does not redirect, you should do an htaccess 301 redirect to make sure the IP does not get indexed.

Your website doesn't have a robots.txt file - this can be problematic.

A robots.txt file allows you to restrict the access of search engine robots that crawl the web and it can prevent these robots from accessing specific directories and pages. It also specifies where the XML sitemap file is located.

Click here to check your robots.txt file for syntax errors.

Your website does not have an XML sitemap - this can be problematic.

A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.

We recommend that you generate an XML sitemap for your website and submit it to both Google™ Webmaster Tools and Bing Webmaster Tools. It is also good practice to specify your sitemap's location in your robots.txt file.

Great! You have clean (user-friendly) URLs which do not contain query strings.
Clean URLs are not only SEO-friendly but are also important for usability.

PageRank™ (commonly called PR) is a link analysis algorithm used by Google™ to assess the popularity/authority of a website. The PageRank goes from 0 to 10. New websites start at PR0 and authority websites, like Twitter.com, have a PR10.

Websites with a high PageRank are crawled more frequently and their outgoing links have more passing juice.

Your website does not have a blog.

In this tough and competitive internet marketing world content marketing rules. While publishing your content on other sites might be a good strategy, publishing it on your own site garners more benefits.

Starting a blog is a great way to boost your SEO and attract qualified visitors.

Use these great tips to boost the SEO performance of your blog.

This lists the websites related to your domain. Some may be competitors while others may be websites with related content.

You may be able to use this information to see how your competitors are doing.

Resource: Use tools to learn more about your competitors' web marketing strategies.

The number of people using the Mobile Web is huge; over 75 percent of consumers have access to smartphones. ‪‬Your website should look nice on the most popular mobile devices.

Tip: Use an analytics tool to track mobile usage of your website.

Try to load your website on a mobile device and measure the download time. If your website takes more than five seconds to download on a mobile device, you will lose 74 percent of your audience!

Mobile usage is growing fast, especially in North America, where it will soon outpace desktop browsing usage. Make sure your site loads fast and that it looks nice on all types of mobile devices. Be sure to not use Flash, and keep photos and videos to a minimum.

Here are two useful tips from Google™ for optimizing your mobile site speed.

Make sure that your website is prepared for mobile browsing.
These are the different aspects that can be optimized for mobile users:

• Mobile CSS
• Meta Viewport Tag
• Apple Icon
• Mobile Redirection
• No Flash content

Your server's IP address has little impact on your SEO. Nevertheless, try to host your website on a server which is geographically close to your visitors. Search engines take the geolocation of a server into account as well as the server speed.

Use DNSstuff for comprehensive reports on your server.

Get to know the technologies used for your website. Some codes might slow down your website. Ask your webmaster to take a look at this.

Website speed has a huge effect on SEO. ‪‬‬Speed-up your website so search engines will reward you by sending more visitors.
Also, conversion rates are far higher for websites that load faster than their slower competitors.

Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed. It is also good to install one extra tool to have a confirmation of the results.

Analytics Tools: Google™ Analytics, Quantcast™, SiteCatalyst™, Piwik™, chartbeat™, Clicky™, ClickTale™, etc.

Use valid markup that contains no errors. Syntax errors can make your page difficult for search engines to index.

To find the detected errors, run the W3C validation service, or check Validator.nu to make sure you don't miss an error.

W3C is a consortium that sets web standards.

Specifying language/character encoding can prevent problems with the rendering of special characters.

Great! Your server prevents visitors from browsing your directory by accessing it directly, this is excellent from a security standpoint.

Good, your server signature is off. This is excellent from a security standpoint.

We use multiple tools to estimate web traffic, including Google™ Trends and Alexa™.

Nevertheless, your analytics will provide the most accurate traffic data.

A low rank means that your website gets a lot of visitors.

Your Alexa Rank is a good estimate of the worldwide traffic to your website, although it is not 100 percent accurate.

Reviewing the most visited websites by country can give you valuable insights.

Quantcast provides similar services.

This is an estimation of the traffic that is being bought through AdWords™ vs. unpaid Organic Traffic.

This data is provided by SEMRush™.