Numerical representations of text, images, or audio that capture their semantic meaning, allowing computers to understand relationships between concepts.
Computers don't understand words; they understand numbers. Vector embeddings translate text like 'King' and 'Queen' into lists of numbers where mathematically, 'King' - 'Man' + 'Woman' ≈ 'Queen'.
Embeddings are the backbone of RAG and semantic search. They allow an AI to understand that a user searching for 'running kicks' is looking for 'sneakers' even if the words don't match.
Embeddings are the universal translator between human concepts and machine math. They map related ideas close together in a multi-dimensional space.
For SEO, this concept is revolutionary. It moves us away from 'keywords' to 'topics'. Google has used this for years (RankBrain, BERT), but now businesses can use it for their own internal search tools.
Vectors are just for text.
Reality:You can embed anything. Image embeddings allow you to search for 'dog' and find a picture of a Golden Retriever without any file tags.
Higher dimensions are always better.
Reality:Not necessarily. While OpenAI uses 1536 dimensions, smaller models can be faster and cheaper while still capturing enough meaning for simple tasks.
Recommendation Systems: 'People who liked this movie also liked...' is often powered by vector similarity.
Semantic Search: An internal wiki search that finds the 'Vacation Policy' even if you search for 'Time Off Rules'.
Plagiarism Detection: Detecting copied content even if the words were shuffled, because the semantic meaning (the vector) remains the same.
You send text to an Embedding API (like OpenAI's text-embedding-3-small), and it returns a list of floating-point numbers.
No, they look like a meaningless list of thousands of decimals. Only machines can interpret their spatial relationships.
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