In Plain English
Think of an algorithm as a recipe: it describes steps and ingredients, although a search system uses many recipes and signals rather than one simple formula.
Why it matters
Understanding algorithm helps you make clearer SEO decisions without mistaking one signal or metric for the whole picture.
Example
A search system uses algorithms to interpret a query and order eligible pages for that particular search.
Common misunderstanding
There is no single SEO trick that unlocks an algorithm. Search systems and results change, so useful, accessible content is a more durable focus.