How can a filter script be optimized to a table?

Brother, jQuery already has the option to filter data and is very easy to use.

As simple as adding

$(document).ready(function(){
  $("#buscar").on("keyup", function() {
    var value = $(this).val().toLowerCase();
    $("#tablaCotizaciones1 tr").filter(function() {
      $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1)
    });
  });
});

Note that I add the function in the "keyup" to the text $ ("# search"), that is to say that it searches in "real time" so to speak it