To sponsor partner and children to join you in UK to live with you permanently or your spouse just want to visit you in UK, there are multiple options available depending on your circumstance.
uk marriage visa requirements
A part of UK spouse visa application, applicant and their partner must prove their income to a certain threshold to make a successful application. UK financial requirements applies to all applications for visa applications made outside UK (entry clearance) and visa extension as a spouse inside UK (commonly known as Further Leave to Remain in UK (FLR)). Many people referred this visa as a marriage visa which is not correct to say as in immigration rules, there is no such visa. Though there is a category called Fiance Visa which is used to enter in the UK and get married to a British Citizen or person settled in UK.