Global Dating Insights is part of the Industry Insights Group. Registered in the UK. Company No: 14395769 
It may be a compressed project file or firmware for specialized equipment (e.g., PLCs or laboratory sensors).
Because this is an uncommon .rar file, you should treat it with caution if the source is unknown: lsl28021.rar
Upload the file to VirusTotal to check it against multiple antivirus engines. It may be a compressed project file or
Are there any in the same folder that might provide context? lsl28021.rar
Use a tool like WinRAR or 7-Zip to "Open Archive" (do not extract) and look at the file names inside. This often reveals the true developer or purpose.