What is the abbreviation of word placement?

There isn't a widely accepted abbreviation for "placement." However, depending on the context, you could use:

* Plcmt. - This is a fairly common abbreviation.

* Place. - This is a more informal abbreviation.

* P. - This is very brief, but could be confusing without context.

Ultimately, the best abbreviation to use depends on your specific needs and audience. If you're unsure, it's best to spell out the word in full.