Because SEO involves keeping your website organic and constantly evolving, your meta data should reflect that evolution. Therefore when data on your website changes, your meta data should reflect that. Although meta data need not be refreshed with every website update, it is vital that it be done at least once every couple of month.
Refreshing meta data also makes your webpage appear new. You could be getting a first page rank on Google with very little click-through due to your meta data, especially your meta description. By refreshing and updating your meta data, users may take notice of your website, and click through. Old visitors that have long since ceased to visit your page may come back, tempted by a promise of new information in your meta data.
New meta data also signals to search engine robots that there are new pages or more pages to index on a website – this can make considerable tribute to your ranking as search engines take a favourable interest in your webpage.
Keyword Assessment | Meta Data | Webmaster Tools | Google Analytics | Monthly Reporting | Robots.txt | .htaccess | Favicon | Site Map | Search Engines | Google Maps | Forms and E-mails | Footer Link | Google Search Engine | Picture Tagging | Directory Page | Social Media | Heading Tags | Indexed Pages | Robots | Sitemap | HTML Errors | Search Engine Errors | Broken Links | Pages and Content | Search Engines | Picture Tagging | Flash and iFrames | Hierarchy | Forms and Emails | Add Media | Static URLs | Descriptive URLs | Duplicate Content | Plagiarism Check | Positive Content | Negative Content | Character Coding | Downloadable Files | Optimize Graphics | Optimize Navigation | Incoming Links | Outgoing Links | Page Content | Meta Data | Rich Content | Reduce Bounce Rate | Social Media | Analyze Competitors | Website Security | 3rd Party Tracking