Answer:
The details about Twain's failures in his odd jobs important to our understanding of the character are that They show that he is eager to work but has few useful skills, making him a loveable but pathetic
Explanation:
"Roughing It" by Mark Twain takes a lot of details from his own experience as a young man going through different working experiences, and growing into was he was going to be, we can see in the story that the character tries in so many ways and so many places to be successful without achieving much, because of his lack oh ability in most of the cases.