Check out example codes for "unity find objects with tag". It will help you in understanding the concepts better.
Code Example 1
yourObjects = GameObject.FindGameObjectsWithTag("Respawn");
Code Example 2
//Find a single game object
GameObject.FindWithTag("TagName");
//Find multiple game objects from tag
GameObject.FindGameObjectsWithTag("TagName");
Code Example 3
GameObject[] arrayGo = GameObject.FindGameObjectsWithTag("myTag");
Code Example 4
GameObject.FindGameObjectsWithTag("Enemy");
Code Example 5
string enemyTag = "Enemy";
Enemies = GameObject.FindGameObjectsWithTag(enemyTag);
Code Example 6
GameObject.FindWithTag("Enemy");
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