How best can writer share their work?

My mother writes short stories and poetry. She isn't all that Internet savvy, but she had a knack for finding local groups of writers to chum with. She managed to get published a couple of times that way, so it seems to work.

The human-oriented group has also the side effect of making the writer a better orator, since they read passages to each other during their meets, and then talk about the works and presentation. I never went to her meets, but I know for sure it helped her diction and use of metaphor big time.

Maybe Reddit would be an option? They have some nice writer subreddits.

writing.com is old school, and focussed on fiction.