Amazon reportedly only pays attention to the first 1,000 characters of a listing's bullet points — content beyond that point is effectively invisible to the algorithm. The practical implication is to front-load the most important keywords and selling points into the earliest bullets and the earliest sentences within each bullet, rather than spreading key content evenly or saving the strongest points for later bullets.
Related to Amazon Generic Keywords (Backend Search Terms Field) as another example of Amazon indexing having hard cutoffs sellers must design copy around. See also Six-Area Amazon Listing Optimization Framework for where bullet copywriting fits in the broader optimization stack.
Confirms the same 1,000-character ceiling from a second source pass, framed as 'Amazon only pays attention specifically to the first thousand characters' of combined bullet-point text. The corollary: bullets written to fill all available character space beyond that point add no indexing value — the instinct to 'use all the space' is actively counterproductive past the cutoff. Reinforces that pictures, not additional bullet text, should carry the messaging burden beyond this point ('pictures are for people, text is for robots').