The word "avail" has several meanings, depending on its context.
1) To be able to use or access something; to have the opportunity to make use of a resource or benefit from it. For example, "I hope this job will avail me with good experience."
2) To come to one's aid or assistance; to provide help when needed. For instance, "In times of need, I can always rely on my friends to be there for me and avail me in difficult situations."
3) To make something available or accessible; to furnish with what is necessary or suitable. An example usage would be, "The company aims at availing the latest technology to its customers."