When you receive a credit card, the card issuer will have set you a credit limit. It is the maximum amount of money you are allowed to spend on your plastic. The credit limit is based on the information from your credit report and an application form. Credit companies take into consideration your level of income, current employment, payment history and other factors.
Different credit companies can have different measures to evaluate your creditworthiness. And that's why one issuer may offer you a plastic with $5,000 credit limit and another issuer may offer you a plastic with $7,000 credit limit.
Most people want to get a high credit limit because it can be a great advantage. It gives you flexibility for purchases and a lot of spending power. It can even increase your credit score because your debt/available credit ratio will be lower.
Typically, the better your score, the higher your credit limit will be. So, if you have a big credit limit, it means that you have proved to be a trustworthy and responsible customer. Some issuers can give you a big credit limit initially or increase it gradually if you manage the debt well.