Filtering using the JOIN instead of WHERE

Question

In SQL (MSSQL, Oracle, etc., whatever), when joining tables, what is the gain from adding a filter to the JOIN statement instead of having it in the WHERE clause?

i.

Answer 1

I sometimes do this in queries that have a lot of joins because it localises all the information about the join in one part of the query rather than having some in the join condition and some in the where clause.