Export pages as images for a website, a chat, a form that only accepts pictures, or a phone that will not open the PDF at all.
Some systems accept nothing but images: a job portal asking for a photo of a document, a social media post, a chat where a PDF is awkward. Exporting the page as JPG solves it, and choosing the resolution decides whether the result is readable or a blur.
For reading on screen, around 150 dpi is enough. For printing or for text that a human must read carefully, use 300 dpi. Higher than that adds size without adding legibility, because the source has only so much detail.
A JPEG has no text layer: it cannot be searched or copied, and a form that expected a fillable PDF will not accept it. If the recipient needs to extract information, send the PDF and use the image only where a picture is genuinely required.
Yes — it discards detail to save space. For text, a higher DPI setting matters more than the format.
Yes, delivered together in a ZIP archive.
JPEG has no transparency; the page background becomes white.