Now you are finally putting actual records into the table instead of just defining its structure.

INSERT INTO is the SQL command used to add a new row. You name the table, choose which columns you want to fill, and then provide the values for those columns in the same order. So the basic idea is simple: columns on one side, values on the other.

One useful detail here is that you do not always need to provide every column manually. If a column is auto-incremented, like an id, MySQL can generate it for you. If a column has a default value, like a timestamp with CURRENT_TIMESTAMP, MySQL can also fill that in automatically. So usually you only provide the values that actually need to come from your code.

The lesson also shows a few small SQL rules that matter. String values need quotes. Numbers do not. NULL should be written as the SQL keyword, not as a quoted string. So "John" is text, 25 is a number, and NULL means no value.

The big picture is: you already created the database, then the table, and now you are adding one row into that table. That row becomes one record in the database.