The phrase "door step" refers to the area just outside someone's front door. It can also be used to mean getting very close to achieving or beginning something. Full definition
For example, he insisted it enables volunteers to enter voter information they collect on door steps on tablets rather than with paper. (canadianbusiness.com)
Buy health insurance that provides good service including ambulance at door steps which don't charge. (policybazaar.com)
Many benefits are there like ambulance is providing service from door steps to hospital and then return home. (policybazaar.com)