Sampling by id from the database?

Question

MySQL

Good afternoon. Such a problem when I go to the page to view the section, all the information that I set from the database is displayed, and I need to display information that belongs to this id.
$id = isset($_GET['id']) ;
$query = "SELECT * FROM products WHERE products_id>='$id' ";
$result = $conn->query($query);
if (mysqli_num_rows($result) > 0 ){
$row = mysqli_fetch_array($result);
do {
}
echo '
Back to store '.$row["title"].'
'
;
}
while ( $row = mysqli_fetch_array($result));
}
?>
The one that the code displays all the information that is there, I understand this. I can’t understand how to put a restriction on it. Tell me how to fix it.