In the Scrum agile framework, the definition of ready (DoR) marks the completeness of preliminary actions for a task or project to be processed.
The DoR, as opposed to the definition of done, can be revisited and modified. It is recommended to consult the team that is responsible for the specific execution to define the DoR. Essentially a task is ready when the team agrees it can be done. This is a core principle of the Scrum Agile Framework.
Once the criteria of the DoR are met, the item which can appear in the form of a technical task, story or any other customized action can be picked for a sprint.