You've learned what logarithms are and how they appear in algorithms. You understand the notation, the properties (product, quotient, power rules), and the change of base formula.
You know why appears when algorithms repeatedly halve the input: binary search, balanced trees, divide-and-conquer sorting. And you've seen how logarithms relate to bit manipulation, digit counting, and space complexity.
You solved four problems using logarithmic techniques: power function, search insert position, perfect squares, and kth smallest in a matrix. Now you can spot logarithmic patterns in code and analyze them with confidence. Good job on finishing this section.