What is the meaning of symbols in chemical equation To be specific, such as the meaning of the arrow, the meaning of the arrow on the left and right

Chemical equation is a chemical expression used to express chemical reaction. It is a chemical term commonly used in the world. For example, 2H2O is electrified, 2h2 ↑ + O2 ↑ HCl + AgNO3 = = = AgCl ↓ + HNO3. In the equation, the left side of the equal sign is the reactant, the right side of the equal sign is the product, and the two substances are connected by a plus sign

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