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What is Spinoza's influence on Hegel?

I am beginning to really get into Hegel for the first time and I have heard multiple people say Spinoza had a great influence on Hegel (and Marx).  I have not gotten into Spinoza yet.

Can someone explain Spinoza's influence on Hegel?
gpt
Spinoza had extensive influence in German philosophy during the period of Hegel's maturation as a thinker, particularly owing to the Pantheism Controversy, which hurtled Spinoza into the limelight of the German intellectual scene. Though, for most German thinkers of this period, the Spinoza they encountered was Spinoza as presented in the documents of this controversy -- Mendelssohn's remarks on Spinoza, or Jacobi's, or Herder's -- rather than a Spinoza they were encountering through the primary sources.

Spinoza's role in the Pantheism Controversy made him a figurehead for general questions about the role of reason and the nature of the Enlightenment, but he also became influential during this period because he was perceived to be the great representative of an "objective" mode of doing philosophy, that was a contrast, corrective, or supplement to the "subjective" mode associated with Kant's idealism.

This context sets the stage for Hegel's engagement with Spinoza. But beyond this what Hegel found in Spinoza was also a philosopher of systematicity, who had presented an encyclopedic account of the various topics of philosophy derived from one another and organized according to foundational principles. And this would become the model for Hegel's own understanding of his mature system.