SEO + Open Graph tags for your site — 100% free, runs in your browser
Meta tags control how your page appears in search results and how it looks when shared on WhatsApp, Facebook or LinkedIn. A page without Open Graph tags shares as a bare link with no image, which measurably reduces clicks. This generates the full set.
Under 60 characters, or Google truncates it. The character count is shown as you type.
Between 120 and 160 characters. Write it as an invitation to click, not a keyword list — it does not affect ranking directly, but it strongly affects click rate.
1200 by 630 pixels. Smaller images may show as a thumbnail instead of a large card.
No. Google stopped using them years ago. The tag is included for completeness only.