Visual information makes your message clearer but it must follow some rules.

Graphs and charts should be simple; backgrounds must be plain; fonts large. Avoid pastel colours so words are easy to read; don’t include more than three columns in charts; discard complicated diagrams. The sound in videos must be excellent and product samples should be finished.

if it’s a small face-to-face meeting forget PowerPoint and provide printed sheets.  Of course, you do not have to show everything you carry but it should be ready in case you need it.

Have a look at Andrew’s book on how to improve your business English: