Everyone seems to have a different opinion about the best way to structure a presentation.
Salesforce recommends thinking about your presentation as a plotline. Wow the audience in your open, and then place the problems as obstacles which need to be worked around. The main character who negotiates these obstacles is the audience and the tool, or supporting character, is your product. Salesforce recommends an audience-centric approach and has a suggested slide layout of how they would approach this here.
BrightCarbon similarly encourages the centrality of the audience alongside few slides and keeping things as concise as possible.
For a very simple and visual overview, WikiHow also has a useful guide of walkthrough steps:
If you want a more indepth insight into creating a sales presentation, then HubSpot have produced an ebook which can guide you through the process.