Short Definition
An embedding is a learned vector representation of an object such as a word, document, image, user, or product.
Intuition
Embeddings turn discrete or complex things into points in a space where useful similarities become easier to compute.
Technical Definition
An embedding maps entities into a continuous vector space, usually optimized so geometric relationships reflect task-relevant semantic or statistical relationships.
Example
Search systems compare query and document embeddings to retrieve semantically related results.
Common Misunderstandings
Embedding similarity is not the same as truth.
Embedding quality depends on the training objective and data.