EXERCICES CORRIGS POO JAVA PDF

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The WooRank score is a dynamic grade on a point scale that represents your Internet Marketing Effectiveness at a given time. Improve your score by working on the red and orange criteria in your Review.

Check the green criteria to find out how your score is being positively affected. Gray criteria are notable, but do not affect your score. Your HTML title tag appears in browser tabs, bookmarks and in search result pages. Make your title tags clear, concise 65 characters, pixels and include your most important keywords. Check the title tags for thousands of pages at once using Site Crawl. Great, your meta description contains between 70 and characters spaces included - pixels.

A good meta description acts as an organic advertisement, so use enticing messaging with a clear call to action to maximize click-through rate. They allow you to influence how your web pages are described and displayed in search results. Use WooRank's Site Crawl to check thousands of pages for meta descriptions that are too long, too short or duplicated across multiple web pages.

Never duplicate your title tag content in your header tag. This data represents the words and phrases that your page appears to be optimized around. The numbers next to each word or phrase represents how often we detected them and their variants on the page. Are these the keywords you want to target for your page?

If so, great! Alternative text allows you to add a description to an image. Since search engine crawlers cannot see images, they rely on alternative text attributes to determine relevance to a search query.

Alternative text also helps makes an image more likely to appear in a Google image search and is used by screen readers to provide context for visually impaired users. It looks like you're missing alternative text for 10 images on exelib. Check the images on your website to make sure accurate and relevant alternative text is specified for each image on the page. Links pass value from one page to another. This value is called 'link juice'. A page's link juice is split between all the links on that page so lots of unnecessary links on a page will dilute the value attributed to each link.

There's no exact number of links to include on a page but best practice is to keep it under Using the Nofollow attribute in your links prevents some link juice, but these links are still taken into account when calculating the value that is passed through each link, so using lots of NoFollow links can still dilute PageRank.

Check your site's internal linking using Site Crawl. Make sure your declared language is the same as the language detected by Google. Specify the language code in the URL as well e. Use hreflang tags to specify language and country for Google, and the "content-language" meta tag to specify the language and country for Bing.

Warning, no redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. Not all versions of your page point to the same URL. Search engines see www. This causes them to see a lot of duplicate content , which they don't like. Right now your website is not directing traffic to www. It is crucial that you fix this.

Use a redirect to divert traffic from your secondary domain. This issue can be caused by problems with a website's SSL configuration. Check your site's SSL configuration for any errors. If you need help resolving issues with your SSL configuration, consider using a professional service to set it up for you. A robots. Your site currently has a robots. You can use Google Search Console's Robots.

See the pages you've disallowed with your robots. XML sitemaps contain the list of your URLs that are available to index and allow the search engines to read your pages more intelligently. Be sure to only include the pages you want search engines to crawl, so leave out any that have been blocked in a robots. Avoid using any URLs that cause redirects or error codes and be sure to be consistent in using your preferred URLs with or without www.

You should also use your robots. All sitemaps are within the file size limit. All sitemaps are within the URL count limit. All sitemaps have a valid structure. Following sitemaps are not accessible. The sitemaps in your robots. Valid sitemaps make search engines happy by allowing them to find new and updated content easily. Make sure your sitemaps are accessible, have valid syntax, are free from content errors and respect the limits set by search engines. To learn more about what a valid sitemap should look like check out our guide about XML Sitemaps or submit it through Google Search Console.

Broken links send users to non-existent web pages. They hurt a site's usability and reputation, which impacts SEO. Be proactive in checking your pages to make sure they don't have any broken links.

Using underscores in your URL makes it hard for search engines to determine your site's relevance to a search. Google sees hyphens as word separators while underscores are ignored. A low number can indicate that bots are unable to discover your pages, which is commonly caused by bad site architecture and poorl internal linking.

Or you've unknowingly prevented bots and search engines from crawling and indexing your pages. An unusually high number could be an indication of duplicate content due to URL parameters.

Make sure your website's XML sitemap is present and that you've submitted it to the major search engines. Building backlinks to your website's internal pages will also help bots to discover, crawl and index them, while building authority to help them rank in search results at the same time. Mobile friendly pages make it easy for users to complete objectives and common tasks and use a design or template that is consistent across all devices uses responsive web design.

This is how your website appears when displayed on different mobile devices. With more than half of all Google search queries originating on a mobile device, it is important to make sure your mobile site is optimized for these users. In the table below, find the tap targets that are too small, their size in pixels and the overlapping target that is too close to be easily clicked.

Great, a configured viewport is present. The content fits within the specified viewport size. Missing 'og:image'. Multiple 'twitter:title' values specified. Multiple 'twitter:description' values specified. Instead, consider using a contact form. Your headers are not properly set up to use HSTS. Renew your SSL certificate now, it expires in a month. The certificate issuer is Let's Encrypt. 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. Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.

The Doctype is used to instruct web browsers about the document type being used. For example, what version of HTML the page is written in. Declaring a doctype helps web browsers to render content correctly. Keep your URLs short and clean and avoid long domain names when possible.

A descriptive URL is better recognized by search engines. A user should be able to look at the address bar and make an accurate guess about the content of the page before reaching it e. Use clean URLs to make your site more "crawlable" by Google. Resource: Search for a good domain name. If no good names are available, consider a second hand domain. To prevent brand theft, you might consider trademarking your domain name.

Great, your website has a favicon.

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