Trouble understanding how split is working here with this for loop

Tell us what’s happening:

Can someone explain what is happening with the variable ‘words’. Shouldn’t words.length give us the length of the amount of the properties in the array?

Your code so far

function findLongestWordLength(str) {
var words = str.split(' ');
var maxLength = 0;

for (var i = 0; i < words.length; i++) {
  if (words[i].length > maxLength) {
    maxLength = words[i].length;

return maxLength;

console.log(findLongestWordLength("The quick brown fox jumpedddd over the lazy dog"));

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Challenge: Find the Longest Word in a String

Link to the challenge:

words.length is the number of items in the array words. words[i].length is the number of letters in each word.