Bacteroidetes
Bacteroidetes is one of the two dominant phyla in most human guts and includes versatile microbes skilled at breaking down complex carbohydrates and dietary fiber. The value here is the relative share of your sample belonging to this group.
Along with Firmicutes, Bacteroidetes makes up much of the typical gut community, and its members help extract energy and nutrients from a wide range of plant foods. Its overall share shifts with diet, particularly the amount and type of fiber you eat.
A higher Bacteroidetes share means this group forms a larger portion of your sample, often discussed in connection with fiber- and plant-rich eating patterns. Because shares are relative and this is a very broad group, a higher value is descriptive rather than inherently good or a diagnosis.
A lower Bacteroidetes share means this group occupies a smaller part of your sample relative to others, which is best read together with your diet and the specific genera present.
No specific Bacteroidetes percentage is established as a goal, since the phylum spans many different roles. Given how young this science is and that the value is a relative share, look to diversity and specific taxa and discuss interpretation with a clinician.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.