What does it mean to be committed to a job?

Its actually comes in few parts:

Customer Engagement

Employers get the best results by modeling a customer-focused leadership style, according to an analysis posted on the Gaebler.com website. If you're committed to your job, you already recognize that satisfaction means going beyond the bare minimum expectations of making customers happy. You understand the virtue of customer loyalty, make customers feel like they're partners in the organization's long-term success, and show an eagerness to promote its products and services in your conversations with them.

Professional Development

Showing vocal enthusiasm about your job goes nowhere unless you're willing to grow professionally. The chance to learn new things is directly tied to employees' hopes for advancement, according to an analysis by the Indiana Association for Community Economic Development. Such concerns rank 11th in employees' conditions for feeling satisfied with a job. Good employees realize that there's always a way to do something better, and they are willing to pursue opportunities that allow them to take stronger roles in how a company functions.

Track Record

For recruiters like Harrison Barnes, your professional track record provides the best evidence of your commitment. Employees who change jobs too often in a short time period risk pushing themselves out of their chosen industry, Barnes asserts. Holding two or more jobs years in five years poses a big red flag for recruiters, because it suggests you won't stick around long enough to build your skills at a particular company. The scenario also suggests that the problem lies with you, not any former employers.

Work Schedules

From an employer's standpoint, one of the most obvious signs of commitment is how employees approach the length of their workday. Good employees accept that sometimes, they might have to show up early -- or stay later -- to help a company accomplish its mission. By contrast, workers who can't wait to punch out at 5:00 are probably more concerned about the employer's ability to make payroll, and less interested in the organization's welfare -- or their own role there.

trying to finish by using skills and expertise//complete at any cost

In a short and simple manner, committing to a job does not mean devoting all you time to it, but rather a belief that the job belongs to you in a way that you truly care for it, for the team members and for the institution you are working in. This belief can be achieved if you try your upmost to elevate yourself, and pull our job up wih you.