How does the form of a poem help to bring out its meaning?

Poetic form is the rules by which a poem is written when
the poet's desire is to present the text following a specified meter, rhyme, rhythm, or
use a specific poetic device.

Poets can follow rules
specific to heroic couplets, Petrarchan Sonnets, or Italian sonnets (just to name a
few). The rules of the poem's form bring out specific meaning for the text, the way a
poem is meant to be read (as in Shakespearean poetry--Shakespeare wrote the way that he
did so that it would mimic human language), or the imagery it was meant to
depict.

For example, a shape poem uses the shape of the
object it depicts and the words form to the shape of the object depicted. A poem about
an apple would look like an apple from far away and the words of the poem form the
picture of the apple. The meaning of the poem would relate to an apple and the form
would provide the imagery.

Therefore, the form of a poem
can help to bring out the meaning in a poem if it follows a traditional known form which
readers are familiar with so that they know how to read the poem and what to look
for.

Novel poetry readers will find it difficult to make
out how the form of a poem adds to the meaning given they do not have enough knowledge
about the reasoning behind the use of any specific poetic form.