After six moving and well-crafted seasons, the This Is Us finale offered an ending that was as gripping as the rest of the series, and each main character's arc was wrapped up in a meaningful way. The fact that the story of Jack (Milo Ventimiglia) and Rebecca Pearson (Mandy Moore) raising their three adopted children, Randall (Sterling K. Brown), Kate (Chrissy Metz), and Kevin (Justin Hartley) is told in both the past and the present brings more weight and emotion to every episode.

https://screenrant.com/this-is-us-perfect-ending-explained-meaning/