Social publishing

Can grav publish art posts accross addobe portfolio, twitter, instagram, tumblr and pinterest? I’d like to increase the reach of each post by publishing in multiple places.

Not natively. It could be done with plugin. Better is to have IFTTT or other service monitor your RSS feed and publish new posts. I personally gave up on automated posting because of the problem of either a draft being accidentally posted or a post getting published many times. It only takes a few minutes to manually post new posts to the few services I use.