LaTeX is a professional typesetting system to create a ready to print/publish (usually PDF!) document (usually papers!). LaTeX is the format used by arXiv, and many journals, when you want to submit your scientific papers. With LaTeX, you "program" the final document: text, figures, tables, bibliography and etc, through a plain-text (source) file. When you run LaTeX on your source, it will parse your LaTeX source and find the best way to blend everything in a nice and professionally design PDF document. Therefore LaTeX allows you to focus on the actual content of your text, tables, plots, and not have to worry about the final design (the "style" file provided by the journal will do all of this for you automatically). This is in contrast to "What-You-See-Is-What-You-Get" (or WYSIWYG) editors, like Microsoft Word or LibreOffice Writer, which force you to worry about style in the middle of content writing (which is very frustrating). Since the source of a LaTeX document is plain-text, you can use version-control systems like Git to keep track of your changes and updates (Git was introduced in SMACK 5, SMACK 6 and SMACK 8). This feature of LaTeX allows easy collaboration with your co-authors, and is the basis of systems like Overleaf. Previously (in SMACK 11), some advanced tips and tricks were given on the usage of LaTeX. This SMACK session is aimed to complement that with a hands-on introduction for those who are just starting to use LaTeX.