You can get extra points in the Express Entry system for having a job offer that meets certain conditions.
You can get the 50 point award as long as you have a valid job offer in a skilled occupation.
The important criteria, which most people miss, is that in order to get the CRS points, your job offer needs to be supported by an LMIA, or be LMIA exempt.
You cannot get job offer points if you are working in Canada on an open work permit, such as a Post-Graduation Work Permit (PGWP), and your employer has not done an LMIA.
If you want the points for the job offer, your employer should get an LMIA
Furthermore, the immigration officer reviewing your file must be convinced that you can actually do the job you have been offered.