SP+ is a rating system created by Bill Connelly (@ESPN_BillC) that are meant to be a predictive comparison of teams. For a more detailed explanation, see this article.
Select a team and a data points to begin generating trend visualizations.
Trend lines help explain whether a team is rising or falling. From there, hop into that team page, the metrics explorer, box scores, or the exporter to keep working with the same team in raw data.