Meta descriptions are the two lines of grey text below each link in Google search results. They do not directly affect rankings, but they heavily influence whether someone clicks your link or the one below it. Google confirmed years ago that meta descriptions are not a ranking factor. But click-through rate is a signal Google pays attention to, and a good meta description is one of the cheapest ways to improve CTR without changing your content or building links.
I write meta descriptions for every page on this site and test them using the character counter before publishing. Here is what I have learned about what works and what gets ignored.
Length: The 155 Character Sweet Spot
Google displays approximately 155 to 160 characters of your meta description on desktop and around 120 characters on mobile before truncating with an ellipsis. The exact cutoff varies by character width. Narrow characters like "i" and "l" allow more characters than wide ones like "m" and "w".
Aim for 150 to 155 characters. This gives you the maximum space on desktop while reducing the risk of truncation on mobile. Every description I write goes through the character counter to verify length before I add it to the page. Going over by even a few characters means your carefully crafted ending gets replaced with "..." which almost always weakens the message.
Under-length descriptions are a missed opportunity. A 70-character description wastes half the available space. Google might decide your description is too short and generate its own from the page content instead, which is rarely better than a well-written intentional description.
Structure That Gets Clicks
The most effective meta descriptions follow a pattern: state what the page offers, then give a reason to click. "Complete guide to character limits on Twitter, Facebook, Instagram, and LinkedIn. Updated for 2025 with current limits and writing tips." The first half tells you what the page contains. The second half tells you why this result is better than the others.
Including the target keyword in the description does not help rankings, but Google bolds matching terms in the snippet. A user searching for "character limits social media" will see those words bolded in your description, which draws the eye and signals relevance. Place keywords naturally within the description rather than stuffing them in awkwardly.
Active voice outperforms passive voice in descriptions. "Learn how to write meta descriptions" is weaker than "Write meta descriptions that get clicks". The second version addresses the reader directly and implies a specific outcome. People click on results that promise to help them do something specific.
What to Avoid
Do not duplicate descriptions across pages. Each page needs a unique description that accurately reflects its specific content. Duplicate descriptions confuse Google about which page to show for a query and reduce click-through rates because searchers cannot tell the pages apart.
Avoid vague descriptions that could apply to any page. "We provide high-quality content and useful information for our readers" says nothing about what the page actually contains. Compare that to "Free online character counter for checking tweet length, Instagram captions, and SMS messages. No signup required." The second version tells you exactly what to expect.
Do not include quotation marks in meta descriptions. Google truncates the description at the first quotation mark, cutting off everything after it. Use single quotes or rephrase to avoid the issue entirely.
Avoid clickbait. Descriptions that promise something the page does not deliver cause pogo-sticking, where the user clicks, immediately returns to search results, and clicks a different result. Google interprets this as a negative signal about your page quality. Accurate descriptions that set correct expectations produce better long-term results than sensationalised ones.
When Google Ignores Your Description
Google generates its own snippet instead of using your meta description roughly 60 to 70 percent of the time, according to studies by Ahrefs and Moz. Google pulls text from the page content that it thinks better matches the specific query. This does not mean writing descriptions is pointless. When Google does use your description, it performs significantly better than an auto-generated one. And for your most important pages, a well-written description gives Google a strong candidate to display.
If Google consistently ignores your description for a particular page, check whether the description accurately reflects the page content. Mismatches between the description and the actual content are the most common reason Google overrides your description with its own selection from the page text.
Writing Process
I write meta descriptions after finishing the page content, not before. The description needs to accurately summarise what the page actually contains, which is hard to do before the content exists. My process is: read the finished page, identify the single most useful thing it offers, write one sentence about that, then add a second sentence with a compelling reason to click. Check the character count. Trim if necessary. Done.
For tool pages on this site, descriptions follow a formula: what the tool does, a key feature or two, and a trust signal. "Free online word counter. Count words, characters, sentences, and paragraphs instantly. No signup required." This works because tool searchers want to know three things: is it free, what does it do, and can I use it immediately. The description answers all three in under 155 characters.
For blog articles, I describe the specific problem the article solves and hint at the depth of coverage. "When to use title case versus sentence case in headings. Comparison of AP, Chicago, and APA style rules with practical examples." This tells the searcher the article covers something specific and references authoritative sources, which signals quality before they even click.