How do you stop clients from losing interest during a pitch?

Hey everyone! When I used to design business pitches, I was worried that my presentation would be understood by the client or not, because I didn't actually know how to create a good-looking presentation design. I used to make boring and too-long paragraph slides. Then I researched outsourcing my presentation design work, so I found this agency, "https://www.presentationexperts.ae/". This agency creates very professional, good-looking, and infographic-style visual slides that my clients like, and I was able to close the deal.