The phrase "advises him about" is correct and usable in written English.
It can be used when discussing someone giving guidance or recommendations on a particular topic or issue.
Example: "The mentor advises him about the best practices in the industry to help him succeed."
Alternatives: "counsels him on" or "guides him regarding".
He has one secret weapon, he added: his wife, an Eskimo who was born in Alaska and who advises him about layers of clothing and socks.
Jack shares with Desmond how he failed Sarah, and Desmond advises him about his need to feel and provide more hope.
Riki is rescued by his father, Shiro, who advises him about the importance of strength and leaves, not knowing Riki is his son.
Theobald advised him about a Black Mass in the penultimate chapter: "The way she describes it is much funnier".
Sara tried to advise him about his career & about Francesca, the well-to-do Italian girl who wanted to marry him & whose uncle was an art critic.
Long nights on the phone with that blabbermouth BOBBY DE NIRO, advising him about which roles it might be better not to take.
There were always other people, white people, who helped him, too: teachers like Mrs. Majors; parents of white friends; people who told him he was smart, who advised him about what he needed to do to get ahead.
Michael Gove puts too much change on our education system and has rarely taken significant heed of the views of teachers, parents, academics, writers, artists and others who have tried to advise him about his changes.
The following summer, Kissinger, on a visit to Richard Nixon's vacation home in San Clemente, summoned Ellsberg's friend Lloyd Shearer, of Parade, to advise him about the news management of his love life.
The queen mother (more often actually the sister of the chief) advised him about his conduct and was regarded as the authority on kinship relations of the lineage; she nominated candidates to fill a vacant chief's position.
Now, Mr. Agate, 66, a retired postal worker with diabetes and heart problems, can present his questions by telephone to Joanne Anderson, a registered nurse who knows his case and calls him regularly to advise him about diet and medications.
