In the beginning of 2017, Twitter said it would take on harassment and hate speech. CEO Jack Dorsey said the company would embrace a "completely new approach to abuse on Twitter" with open dialogue along the way.

For months, though, the company has offered few details about what it would do, or when. That changed late yesterday, when Twitter posted a timeline with specific promises on actions it will take.

The changes begin next week. On October 27, Twitter will expand what types of "non-consensual nudity" (aka "revenge porn") that it takes action against. The company will already act when a victim complains, but Twitter will soon act even in cases where the victims may not be aware images were taken, instances like upskirt photos and hidden webcams. "Anyone we identify as the original poster of non-consensual nudity will be suspended immediately," the October entry reads.

On November 3, Twitter will ban hate imagery in profile headers and avatars, and the service will start suspending accounts "for organizations that use violence to advance their cause." The same day it will institute a policy of stopping "Unwanted Sexual Advances," although the company says it has already been taking enforcement actions on this front. Later in November, Twitter will ban "hateful display names."

In a blog post accompanying the changes by "Twitter Safety," the company writes, "This won’t be a quick or easy fix, but we’re committed to getting it right. Far too often in the past we’ve said we’d do better and promised transparency but have fallen short in our efforts."

Not all the steps in the timeline are part of a crackdown. Other changes are meant to open a dialogue with people who have accounts that may be in gray areas. For those about to have their accounts suspended, Twitter will institute e-mail notifications and an appeal process for those who think they were banned improperly. Twitter has committed to better explaining its policies around everything from spam to the technology it uses to catch rule violators.

Here are some key dates on Twitter's safety timeline:

10/27: Non-consensual nudity like upskirt photos and hidden webcams will be banned.

11/3: Organizations and groups that advocate violence will be suspended.

11/3: Hate images and hate symbols will be barred, including in avatars and profile headers.

11/3: Unwanted sexual advances will become an explicit rule violation.

11/22: Hateful display names will be barred.

12/14: Content that "glorifies or condones acts of violence that result in death or serious physical harm" will be barred from Twitter. The company already removes content that "includes a violent threat or wishes of serious harm."