A useful distinction
A comparison can use an editorial criterion while also containing compensated links. Payment should not be disguised as independent testing or an unexplained claim that one product is best. Readers need the basis and relevant relationship to interpret the page.
Put it into practice
Write the selection criteria before arranging the products. Identify any paid inclusion and keep it distinct from evidence about features. Do not invent testing, rankings or user experiences to support an advertising slot, and explain limitations where the available evidence is incomplete.