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A high-performing meta description is 120–160 characters, begins with the primary keyword, clearly states the benefit or outcome for the reader, includes a subtle call to action ('Learn how', 'Discover', 'Get started') and is unique to each page. Avoid generic filler phrases — every word should earn its place in 160 characters.
Google rewrites meta descriptions roughly 60–70% of the time when it judges the existing description doesn't accurately reflect the page content, or when a user's search query matches content in the body text better than the meta description. Pages with well-matched, information-rich descriptions are rewritten less often.
Yes. Duplicate meta descriptions are a quality signal that Google takes seriously. Each page should have a description tailored to its specific content and target keyword. For large e-commerce or directory sites with thousands of pages, use dynamic templates that pull unique product or location names into the description formula.
If you leave the meta description empty, Google automatically generates a snippet from the visible page content — usually the first paragraph or the most relevant on-page text it can find. Auto-generated snippets are often suboptimal: they may be too long, lack a call to action or miss your target keyword. Always write custom descriptions for your most important pages.