Right from the start, Messi's dynamic performances proved key as he scored twice in a 3-0 victory over Alaves on the opening day of the season. It was Barcelona's impressive start that set the tone for what was to come, with Valverde's men winning each of their first four fixtures.
Following a minor stumble in September and October, during which time they failed to win on four consecutive matchdays - drawing with Girona, Athletic Club and Valencia and losing to Leganes - they got back on track and have been top of the league for most of the season.
Dembele's decisive equaliser
Diego Simeone's Atletico Madrid proved to be their closest challengers all season. Ousmane Dembele's last-gasp equaliser following Diego Costa's opener in their 1-1 at the Wanda Metropolitano in November proved decisive. A loss would have seen them drop into third; instead they finished the matchday behind only Sevilla, leapfrogging them into first place just a week later. They have been top ever since.
That draw against Atleti was followed by an eight-match winning streak, during which they conceded just twice.
Barcelona are not often associated with defensive solidity but that is unfair. In addition to the headline-grabbing goals from Messi, Suarez et al upfront, the Blaugrana have been incredibly stingy at the back this season, thanks in no small part to the formidable centre-back partnership that has developed between veteran Gerard Pique and summer signing Clement Lenglet.
What's more, on the rare occasions when these two were overcome, opposition strikers came face-to-face with Marc-Andre ter Stegen. The German had another sensational year between the sticks, proving once again that he is one of the very best goalkeepers in the world, if not the best.
Valverde oversees another win
All of the above has combined to make Barcelona champions once again and the fact that they have done so with weeks to spare proves just how dominant they have been.
Valverde's side have come up against world-class opponents from the capital in the form of Atletico Madrid and Real Madrid, a Sevilla side that started the season in unstoppable form, Europa League semi-finalists Valencia and many other challenging sides, but they have conquered all in their path and are now deservedly celebrating their 26th La Liga championship.