Have you used the Explain tool and in what cases is it applied?

The Explain tool is most commonly used in the context of databases to analyze the execution plan of SQL queries. In Go, Explain is not used directly, but if you work with a database through Go, Explain helps understand how the DBMS processes the query, identify bottlenecks, and optimize queries.

For example, when working with PostgreSQL through Go, you can execute the query EXPLAIN ANALYZE SELECT ... and analyze the result for optimization. This is important when query performance affects the application's operation.