1. Conditional clauses: The answer uses conditional structures like "if the celebrity doesn’t fit the brand...the endorsement can come across as insincere and even backfire," showing the ability to discuss hypothetical situations and their consequences.
2. Passive voice: "are aimed at young, trend-conscious consumers" and "are costly" use the passive voice to focus on the object rather than the subject, which is common in formal and semi-formal spoken English.
3. Present simple tense: The answer consistently uses the present simple tense (e.g., "depends," "boost," "fit," "focus") to discuss general truths and opinions, which is appropriate for IELTS Part 3.
4. Modals for advice and speculation: "need to weigh the potential benefits carefully before investing" uses the modal verb "need to" to give advice, and "can" to talk about possibility or ability, both of which are useful for expressing nuanced opinions.