There are two extremely important slides. Their quality has a tremendous impact on your audience impression. They are, of course, your very first slide and the second most crucial slide is the closing one. Unfortunately, there is no one-size-fits all solution. You can show them something funny and make them laugh, or use a quote or a piece of advice you think will resonate your message. This advice is from the presentationmagazine.com website. An effective presentation should have a solid structure with the message and information flowing smoothly during the whole delivery of the presentation. The last slide should offer some kind of closure.
Which ending to choose?
There are different endings, each suitable for different occasions. When you give a speech to a big auditorium, you usually end the presentation twice. The first ending comes before the Q&A session, this slide should be a summary of what has been said. After this session, it is time for a traditional closing slide.
Your contact information
Your name is important, so have it on the last slide. Repetition helps your audience to remember. They may want more information about you or even contact you, so be sure you provide all the necessary information. Since people visiting conferences tend to often use Twitter, include your Twitter handle on the last slide and you may acquire a lot of followers.
Your company
The last slide is a great opportunity to display the name or logo of your company. You are an ambassador for your company and colleagues. Your audience will probably be interested in knowing more about where you gained your knowledge and insights.
Link where your slides can be downloaded
You can upload your presentation to the slide hosting site you prefer and than include a short, personalized URL to your audience.
Call to action
Be clear and focus on one single action you want your audience to take. Maybe you want them to remember a quote, email you their opinions or follow you on Twitter? Display direct instructions.
Credits and thanks
Properly credit your coauthors and colleagues who provides you with slides, quotes and information you present. Thank your audience, as well.
-jk-