Additional skills increase market value and role breadth most robustly when they become visible as connectable signal skills with concrete role and impact relevance. Decision criterion: additional skills must credibly expand profile breadth or responsibility level and must not be formulated as blanket salary promises. Specifically: prioritise additional skills by target role and responsibility level; substantiate each additional skill with a task, tool, or impact. (Sources: ESCO Classification, Cedefop Skills Forecast)
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