A meta description is an HTML meta tag that provides a brief summary of your page's content. Google and other search engines often display it as the snippet text below your blue clickable title in search results. The tag lives in your page's <head> section and looks like this: <meta name="description" content="Your summary here">. Meta descriptions don't carry direct ranking weight—Google confirmed this years ago—but they're still critical. A well-written description can lift your click-through rate by 5–15 percentage points, and higher CTR sends positive user signals that do affect rankings over time. Think of it as your organic ad copy. Optimal length sits between 150 and 160 characters. Google truncates longer descriptions with an ellipsis, cutting off your message. Mobile displays are even tighter, around 120 characters, so front-load your most compelling point. Include your primary keyword naturally because Google bolds matching terms in the snippet, which catches the eye. Google doesn't always use your meta description. If it thinks another part of your page better matches the searcher's query, it will pull that text instead. We see this happen 30–40% of the time across our portfolio. That's fine—it means Google is trying to be relevant—but it also means you shouldn't obsess over perfection. Write for humans first. At Ottawa SEO, we treat meta descriptions as conversion tools. We answer the searcher's intent in one sentence, add a differentiator (price, location, unique feature), and sometimes include a soft call to action. For local pages, we mention Ottawa, Kanata, or Nepean when geography matters. For transactional pages, we lead with the benefit or outcome. Skip meta descriptions entirely and Google pulls random sentences from your page, often producing incoherent snippets that crater your CTR. Every page worth indexing deserves a unique description. Duplicate descriptions across pages waste the opportunity and confuse users about what distinguishes each URL.