Creating Indexes in LaTeX

\documentclass{book}
\usepackage{imakeidx}
\makeindex

\begin{document}
\chapter{Foundations}
LaTeX\index{LaTeX} supports structured writing.
Bibliography\index{bibliography} workflows are flexible.

\chapter{Methods}
Hyperlinks\index{hyperlinks} improve navigation.

\printindex
\end{document}

Neural networks\index{machine learning!neural networks}
Transformers\index{machine learning!transformers}