picture is not added twitter

Could you post your site URL here, so I can have a look?

If you want it to remain private, you can also contact us via this contact form:
https://jetpack.me/contact-support/

If it’s not showing on Twitter, there’s a fair chance that your domain hasn’t been approved by Twitter. If you haven’t done this before, visit this site: https://dev.twitter.com/docs/cards/validation/validator
select any card type, then click the Validate and Apply tab
Enter the URL of a post (e.g. https://example.com/2014/06/example-post and validate
A notice will display with the domain’s status.

Cheers!