She originally came on the show as the wife of Tony DiMera. Her father was Kallem Chandler, the governor of whatever state Salem is in. He was a monster and raped Marlena. Her brother was Todd Chandler, who died.
Tony and Liz got divorced and she married Neil Curtis. She and Neil had a daughter together, named Noel. At some point, she and Neil bought Doug's Place and renamed it Blondie's. Liz was a singer and regularly performed at Blondie's.
Liz had an affair with a guy named Carlos, then she and Neil broke up and divorced, and she eventually left Salem with Noel. This is all in a nutshell.
In real life, Gloria Loring was married to Alan Thicke, who was best known as the dad on Growing Pains. She sang the theme song for the show The Facts of Life. She's also the mother of singer Robin Thicke. Her other son has juvenile diabetes and she advocated to have that type of storyline on Days, so the writers had Liz and Neil's little girl get diagnosed with juvenile diabetes, which was groundbreaking at the time.
During her run on Days, she did a duet with a guy named Carl Anderson called Friends and Lovers, which was a top 10 hit. It became Shane and Kimberly's love song.