Which meta tags actually matter
There are dozens of meta tags and only a handful earn their place. The title and description shape how your page appears in search results. The Open Graph tags shape how it appears when shared. The canonical link tells search engines which URL is the real one. Almost everything else — keywords, revisit-after, distribution — carries no ranking weight with Google or Bing.
Titles and descriptions
A title should describe the page in about 60 characters, front-loading the words someone would actually search for. A description does not affect ranking, but it is advertising copy shown directly under your result — a specific, useful description earns clicks that a generic one does not. Google frequently rewrites descriptions when it thinks the page offers something better, which is a signal your description was not matching the query.
Open Graph and the social card
og:image is the tag with the largest visible payoff. A link with a card image takes up several times the screen area of a bare link in a feed or a chat message. Use an absolute URL at 1200×630, and remember that most platforms cache the image aggressively — changing it often requires their debugging tool to re-scrape.
To check your description against the display limit as you write, the character counter shows live counts. For the crawler-facing side of SEO, see the robots.txt generator and XML sitemap generator.