I use Touring Plans for multiple things:
1 - Crowd calendar, to decide when to visit and which parks are potentially best on which days (because their calendar will take things into account that we might not think to consider, like the impact of early closures, night-time events, local holidays, cheer and sports competitions, etc.). A companion tool is the "crowd tracker," which will let me know if crowd projections or hours change for my dates, and even, as the trip gets close, tell me the weather forecast for each day.
2 - Touring plans, particularly since we've never visited more than once every 2-3 years. That means that almost every visit, there are one or two new attractions (or closures!) that can influence crowd flow and change the recommended touring order. I like to use the "Personalized Touring Plan" feature to see if the plan I have in my head is going to be likely to work out, or whether I should do things a different way to save time in line. Accessing that plan in the TP "Lines" app on my phone, in the parks, allows me to pivot and have a new, optimized plan quickly, in the event something doesn't work out (e.g., we arrive at rope drop to find multiple attractions "down"). Indeed, in our experience, the "Lines" app tends to be way more accurate with wait times than Disney's
MDE app, so that's the one we rely on in the parks.
3 - For onsite stays, the room finder and room request tools are essential. They allow me to see where the rooms within my booked category are located and what their individual views and pros/cons are, and make room requests that will best fit our needs.
4 - The ticket finder tool, which allows me to compare Disney's ticket prices with those of multiple authorized resellers, for multiple date spreads, all at once, and find the tickets that will save us the most money. (Last trip, this tool alone saved us $300 over Disney prices, on parkhoppers for my party of 4).
5 - The menu search tool, which I use to find specific food and beverage items in the parks and resorts. Wanna know precisely where to find a cream-cheese stuffed pretzel (my kids' #1 most-requested snack), 1% milk, or some sushi? This tool is for you!
I don't work for
touringplans.com and have no interest in the company, but ever since I first subscribed to it for my family's inaugural trip to WDW with the kids around 2012, it's been a "must" for me, and has saved us so much time and money on trips that it's paid for itself many times over.