What is the conclusion of the sonnet18 and how does it contribute to the poems overall meaning?

The conclusion of Sonnet 18 by William Shakespeare emphasizes the immortality of the beloved through the timeless power of the poem itself. The speaker suggests that as long as people read the poem, the beauty of the beloved will never fade, thus achieving a kind of eternal life through the written Word. This contributes to the poem's overall theme of the enduring nature of love and beauty.