None at all. It's not really worth bothering with unless you have been here for years and comment on hundreds of questions or written lots of takes. I'm not here for the status, only to ty to help in my own little way.
Reach lvl 10, gain 20,000 xper points and I think you gain the guru title, really the only thing it gives you though is putting your opinions right below that of the masters from the top to the bottom.
There are no added benefits for becoming a Guru here. The only benefits certain xper levels have are:
Xper Level 1 can post 2 questions and 1 take every 24 hours. Xper Level 2+ can send private messages Xper Level 2+ can post 5 questions and 2 takes every 24 hours. Xper Levels 2+ can add clickable links in their posts. Xper Levels 1-6 see ads. Xper Levels 7+ do not see ads.