strongly recommended
Something required for an application, contest, audition, etc. if one wants to have any chance of moving forward or succeeding. While one is technically allowed to give a submission without the "strongly recommended" material, their submission will likely be ignored.
Synonyms for Strongly recommended
On this page, you will find 30 slang terms related to strongly recommended. Some of the top words include: chuh, can't lose, Unprovoked, yes, OK, and 25 more.