@londonseo are you using GSA SER on an english-language computer, and are your clients looking on an english language Excel? The only problem I ever found with Excel opening CSVs is when the generating and the opening computer use different characters for list separation, e.g. in the UK it's a "," but in Germany it's a ";" What you could do is to upload the data for your clients to a Google sheet, so they are in the cloud and universal. They can then always download it for local Excel usage should they so desire, and it also looks quite professional
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The only problem I ever found with Excel opening CSVs is when the generating and the opening computer use different characters for list separation, e.g. in the UK it's a "," but in Germany it's a ";"
What you could do is to upload the data for your clients to a Google sheet, so they are in the cloud and universal. They can then always download it for local Excel usage should they so desire, and it also looks quite professional