How does SEM differ from SEO and what are the main advantages and disadvantages of each strategy?? 2. ?What are some common mistakes to avoid when

1. How does SEM differ from SEO and what are the main advantages and disadvantages of each strategy?

2. What are some common mistakes to avoid when optimizing a website for SEO?

3. How can you measure the effectiveness of an SEM campaign and what metrics should you track?

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