I cannot share specifics of my work, which is unlikely to result in a satisfactory answer. So, sorry. I'll be blunt that most of it is tackling banal issues. Scrolling through our social impact report which includes the public stuff I found the highlights I thought were interesting. You can take this with a grain of salt and I don't tend to find these things super convincing for any company, but here:
* Founded a non profit which has upskilled hundreds of thousands of medical workers
* Did a lot of pro bono work (meaning "valuable" consulting work, but also the usual humble volunteer stuff) to keep food banks alive during covid
* About $200M in pro bono work dedicated to improving racial equity and hosting a leadership program for black leaders
* $2B in cash and support dedicated to social responsibility (I think this is mostly climate?) over the decade
* Around 220,000 hours of pro bono consultant time over the year
* Apparently we helped Khan Academy reach kids as things were going remote and TeachForIndia
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And of course there's the not totally pro bono stuff which is just "nice problems to work on". Some people scoff at this because its paid for, and it is typically very expensive. But I'll list it it anyway:
* COVID response for 35+ national governments and many smaller governments
* Public Health
* Economic and Social Development
* Racial equity and diversity
* Upskilling or reskilling workers who lost jobs
* Lots of decarbonization and renewable energy stuff
You can read if interested here: https://www.mckinsey.com/~/media/mckinsey/about%20us/social%...
And again, many companies have stuff like this. I tend to think this is a bit better than average big co., but whatever, it doesn't hit my day to day. In my opinion the more down to earth impact that you might enjoy is just helping companies you like do better. If you like to help pharma, or renewables, or videogames, or... banks, you can do that. Which is just kind of good enough on its own. Unlike a job where you work within your little sphere within a big company, consulting lets you just tackle big problems with the big decision makers. idk, my experience has been largely positive. I'm happy to speak on its behalf. I know I could go work for Facebook and earn probably another $100k, but I feel pretty strongly that would be a lot less fulfilling. My view of the firm has maybe 50 people in it. It's a pretty flat org. And you have a clear line of what partners oversee your stuff. It was legit upsetting to hear about the ICE work during the trump admin for myself and many others, but at the same time it feels more like a separate subsidiary. Less like facebook where all rolls up to zuck. Like if you worked for ben and jerry's and something bad happened at dove. Both are owned by unilever. Is dove thus representative of all of unilever? Ehhh I don't think so. Example companies chose at random.
tl;dr solving business problems you're interested in is simply a good business.