Chapter 1
I was surprised by all of the different web hosts and other internet usages for GIS that were discussed in this chapter. The section on technology also provided a lot of insights on what all of this data can actually be used for as well. The overview of contents was very useful (data, layers, web maps, scenes, tools, and apps). The section on different types of layers was also very helpful in understanding how they can be applied to projects in the future.
Chapter 2
At it again with more information on layers in this very helpful section. The table on smart-mapping styles was also useful, and the description will be helpful when determining what type of map to use for a project. The pop-up function seems very similar to the desktop version. I also recognized the story maps from desktop, I think this is very useful for when you are trying to convey information to an audience that might not be very familiar with your topic.
Applications
I looked to the table on page 41 to guide some of my ideas for different types of maps. An application for a dot density map would be locations of pet stores where I can buy my cat toys in the area. Another application would be a heat map, which could indicate the number of cat owners in the area.