This is an entry in our Disneyland 101 Glossary: Disneyland Resort definitions in under 101 words, from Mouse Brief.
Simba Parking Lot is located west of the Downtown Disney District and provides paid and validated parking for visitors to the Downtown Disney District at Disneyland Resort. Current parking rates are posted on the Disneyland Resort website. On the website you will also find information about conditions for complimentary validated parking. At the time of this writing, restaurants in Downtown Disney validate for complimentary parking to be applied after one paid hour of parking. If you are dining at select restaurants at one of the Disneyland Resort Hotels, you may receive validated parking for the hotel parking lots themselves.
For tips on how to have fun in Downtown Disney and at the Disneyland Resort Hotels, check out Terrific Ways to Have Fun at Disneyland Without a Ticket