It's really depends whether your users are B2B and B2c always think like searchers what they will search in Google to find out solution of their problems which is related to services. You can look at your competitor website for keyword suggestion.
i would Like to say , If You Want Best keyword For Your website .you Should have know Which Type Business Or services.You Know That what searchers what they will search in Google.After Check Competitor You Should Take high Searcher keywork and Low Competitor Why ? Because it' Fast To gets result .
Do deep research before choosing any keyword for your website as keywords are the most important part of website to get good rank on SERP, the most relevant word for website can be the best keyword, one can try Mejesticseo tool to do good keyword research.