As its mobile counterpart, it gives you access to flights, hotels, tour packages and other relevant information in one place. The left menu has tabs that allow you to access each of these details. If you are signed in to your Google Account, it can also give you tour suggestions based on your location and past searches. It can also keep track of all the locations and planes you have stored so you can return to where you left off.
Once you have booked hotels and flights, it will automatically add the information to your timelines, as long as you have received an email confirming the booking. The portal will also keep track of the hotels and activities you have looked at and stored in the near future. However, if you feel uncomfortable with giving Google so much information about your journey, you can opt out by changing your settings for "private results" and "web and app activity".
In addition to the new portal, Google has also rolled out an update for Maps to mark popular neighborhoods on the site you visit by describing what they are known for. In the coming months, Google will make hotel and restaurant reservations available from Maps as well.