Meta descriptions don't directly influence where you rank in Google's algorithm—John Mueller and Google's documentation have confirmed this repeatedly. However, they're critical for SEO because they control what searchers see below your title in search results, and higher click-through rates send behavioral signals that can indirectly improve rankings over time. When your meta description is compelling and matches search intent, you get more clicks at the same ranking position. A page ranking fourth with a 6% CTR will often outperform competitors ranking third with 4% CTR in total traffic, and Google notices when users consistently choose your result over others. This is especially true for commercial keywords where the difference between a generic description and one highlighting specific benefits (price, location, unique features) can double your traffic. Google rewrites meta descriptions roughly 63% of the time according to various studies, pulling text from your page content instead. This happens when your description doesn't match the query, is too short or long, or is keyword-stuffed. The sweet spot is 140–155 characters—short enough that mobile doesn't truncate it, long enough to communicate value. We write them at Ottawa SEO to answer the searcher's implied question: for a plumber page, not "We offer plumbing services in Ottawa" but "24/7 emergency plumbing in Ottawa. Licensed, insured, 90-minute response time. Call now for same-day repairs." For pages targeting multiple long-tail variations, a strong meta description acts as a filter—it pre-qualifies clicks so you get qualified traffic rather than bounces. E-commerce product pages and local service pages benefit most. Blog posts matter less since Google often rewrites them anyway based on the specific query. Missing meta descriptions mean Google pulls random text, often starting mid-sentence or grabbing navigation elements. That tanks CTR. Even if descriptions don't move the ranking needle directly, the CTR and engagement difference makes them non-negotiable for any page you expect to rank.