To manage my clients, how should I segment them in usefel respects? By
revenue, profibility, and potentiality? Kindly advice me with specific
standard and a well-organised methodology.

Leslieliu --

Segmentation depends on your objectives.  If you feel that
understanding their business objectives and competitive environment is
important, you may want to segment them by industry.  If you are
emphasizing a particular technology, you may segment them by how much
they're using that technology -- or by potential use of the
technology.

In an established practice, management should have you focusing on the
most-profitable clients.

Best regards,

Omnivorous-GA