Hi Katie....you're right...there's alot out there and sometimes difficult to figure it all out. I'll do my best and I'm sure others will chime in as well.
HPV is a virus. There are many strains of the virus some are considered HIGH RISk and others are considered LOW RISK. Both kinds can cause cellular changes on the cervix however the HIGH RISK strains cause changes that if not monitored or treated can progress to cancer. I'm told this progression is usually very slow and can take many years. The good news is there is alot that can be done during that time to stop the progression and remove the dysplasia. The low risk HPV can cause changes but these changes are not thought to progress.
Now when changes occur on the cervix, the PAP or colposcopy will grade the changes. PAPS(screening) are not as accurate as colposcopy with biopsy (diagnostic). The changes or dysplasia are classified as
1. ASCUS-atypical (mild abnormality)
2. CIN 1 (LGSIL)
3. CIN 11
4. CIN 111 (HGSIL)
5.CIS- Carcinoma In Situ--Cancer in its place (i.e has not spread)
The options for dealing with the changes (dysplasia) include "waiting and watching"--usually for ASCUS or LGSIL, then LEEP, Cryo, Cone, Hysterectomy etc. for higher grades and/or CIS.
From your post, it sounds like you have hrHPV (high risk) with moderate+ dysplasia and to treat it your doc wants to perform LEEP. This procedure from what I understand is highly successful. There are several women on the board who have had the procedure so hopefully they can weigh in more on the procedure.
Hopefully this helps somewhat. Take care!