What is a specific platform and how do you use it?

Found Job on web page Screened by HR Folks, Standard questions, verifying data from resume Offered a trip to interview Interviewed, a day long process: Was asked to meet tam members and interact in technical discussions. The only forced point was provided about work planning and schedule. This must have been a hot issue at the time. Was escorted from interview site and told communication would follow. 7 days later I was made an offer, and accepted.