A solution is a homogeneous mixture of a solute and a solvent. Both can be solid, liquid, or gas. Solutions exist for every possible phase of the solute and the solvent.
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. Remember, solutions are homogeneous mixtures.
You can find many solutions in your daily life.
For example, solutions are salt and water, rubbing alcohol, and sugar dissolved in water.
Let's take salt and water.
Solute here is the salt and the water is the solvent. The amount of solvent is higher than solute in a solution.
When you look closely, upon mixing salt with water, you can't see the salt particles anymore, making this a homogeneous mixture. That is why the mixture of salt and water is a solution.