I'd like to advertise my portfolio on platforms like Twitter and Insta but not really sure where to start.

For those who are doing it already, or have done it in the past:

- Have you noticed any benefit to it?
- Which platform did you use?
- If you have the same file on many agencies, how do you pick which agency you advertise?
- How often do you post every day?

Any advice would be awesome!

 

Don't waste your time. All you will be doing is free marketing for the agency.  The odds of you making more than maybe 5 cents / hour trying to do marketing of your portfolio is very slim.

Spend your time producing new content to upload.

If you had reason to think you could attract buyers, you'd sell direct and keep 100%.