The canonical OG image size is 1200×630 — it works on Facebook, Twitter (X), LinkedIn, Slack, Discord and Telegram.
Add it to your page with <meta property="og:image" content="https://yoursite.com/og.png"> and <meta name="twitter:card" content="summary_large_image">.
Keep text on the top 2/3 — Telegram & some chat apps overlay a play icon at the bottom.
Use a unique image per page — generic logos get scrolled past.
Test your OG image with opengraph.xyz after deploying.
Need a feature graphic too?
The Feature Graphic Maker covers Play Store + Twitter banner + wide promo sizes in one go.