Visit the awesome guide from Geoff Rich to learn more.
You can also play around with the variables here to generate an image.
URL query string: https://ogimggen.vercel.app/og?title=SvelteKit Open Graph Images&author=Author Name&website=website.com&img=https://res.cloudinary.com/defkmsrpw/image/upload/v1578491966/social/spencee.png
https://ogimggen.vercel.app/og?title=SvelteKit Open Graph Images&author=Author Name&website=website.com&img=https://res.cloudinary.com/defkmsrpw/image/upload/v1578491966/social/spencee.png
This is the actual component with default props, fixed height and width: