SEO and SEM go hand in hand but are very much different from each other. Search Engine Optimization is a technique by which you improve your search rank and drive traffic to your website. Search Engine Marketing is rather a broader term that encompasses SEO as well. It includes paid or sponsored advertisement, ensuring more visibility of your website.
Removing Cross Group Negative Keywords: Cross-group negative keywords are bound to happen when you use the modified or broad match feature in your campaigns. These terms cause ads to compete with each other, and your CPC will grow as a result. However, while it is time-consuming to remove cross group negative keywords the ‘cross group negatives’ button will save you a great deal of time. You will stay on budget as a result and avoid competing against your own ads.
I just tried and its working fine from my end. When clicking on the link, you should be taken to the SEMrush page where you should be able to grab SEMrush pro account for free for the next 14 days worth $47. Please clear cache for your browser and try then. Please let me know if you still face any issue in claiming the 14 days SEMrush pro account for free.