It expresses a desire or wish to have the ability to do something.
Here are some examples:
* Je voudrais pouvoir parler anglais. (I would like to be able to speak English.)
* Je voudrais pouvoir voyager autour du monde. (I would like to be able to travel around the world.)
* Je voudrais pouvoir aider les autres. (I would like to be able to help others.)
Note: The verb "pouvoir" (to be able to) is in the conditional mood here, indicating a desire or wish rather than a statement of fact.