What is the significance of using backticks (`) instead of single quotes ('') in SQL queries in PHP?

Using backticks (`) instead of single quotes ('') in SQL queries in PHP is significant because backticks are used to escape table and column names in SQL queries. This is important when working with table or column names that are reserved keywords in SQL or contain special characters. By using backticks, you can ensure that your queries are executed correctly without any syntax errors.

$query = "SELECT * FROM `users` WHERE `user_id` = 1";
$result = mysqli_query($connection, $query);