There are many different synonyms to describe the action of "giving the lowdown on" something. Some alternatively used phrases include "filling in the details," "providing insight," "offering information," "sharing the scoop," and "shedding light on." Other possible terms include "cluing in," "letting in on the secret," "briefing," "covering the specifics," and "unpacking the details." Depending on the context, various terms may be more or less appropriate for describing the act of conveying information or sharing knowledge, but all of these options represent alternative ways of expressing the same idea.