Whether it is lecture slides or presentations, you often wants to distribute pdf-versions of your beamertex file. If you are using overlay to blockwise show text or blockwise highlighting parts of tables (see here and here for ways to color parts of tables with overlay), it makes little sense to distribute the pdf versions where one and the same slide is repeated with each overlay step. Luckily, there is a extremely simple solution

Instead of the standard beamertex top row, such as

\documentclass[aspectratio=169]{beamer}

simply add the option handout to it to create a pdf where each and every slide is shown only once, irrespective of the number of overlays built in:

\documentclass[aspectratio=169,handout]{beamer}