Trello is a versatile project management and team collaboration tool. Here’s what you need to know:

Visual Organization: Trello mimics the concept of using sticky notes on a virtual board. It’s built around the Kanban method, emphasizing visualizing work stages to increase productivity and organization. 

Boards, Lists, and Cards:
Boards: Whatever the project or process, boards keep tasks organized and work moving forward.
Lists: Represent different stages of a task. Customize them to fit your team’s needs.
Cards: These represent tasks and hold all the information needed to get the job done. Move cards across lists to show their status.

Attachments: Easily attach files to cards.

Checklists: Break big tasks into smaller ones and track progress.
Due Dates: Set and manage due dates.
Members: Add team members to cards for accountability.
Views: Display data across boards using Calendar, Timeline, Table, and Dashboard views2.
Integrations: Trello integrates seamlessly with apps like Slack, Outlook, Gmail, Salesforce, and more. Add Power-Ups to customize workflows for your specific needs.

Pricing : Free, Premium

Site :  Trello