There are a plethora of synonyms for the phrase "gives an idea." Some useful options include "provides insight," "offers a glimpse," "serves as an indication," "affords a notion," "conveys a suggestion," "contributes to understanding," "imparts an inkling," "brings to mind," "instills a thought," and "stimulates contemplation." While each of these phrases has a slightly different connotation, they all serve to communicate that something is being communicated that allows the listener or reader to better understand or imagine a particular concept. By using varied language to convey this message, writers and speakers can keep their audiences engaged and make their work more interesting and compelling.