The phrase "to use the portal" means to access and navigate a specific doorway or entrance, typically in a digital or virtual setting, in order to reach a designated location or obtain certain information or services. Full definition
The service is free of charge, both to job seekers using the portal for their job search and for employers posting their job openings to the site. (sciencemag.org)
They must also use the portal to launch all their applications. (slaw.ca)
Don't forget to use portal with the highest CB offer. (dannydealguru.com)