The personal allowance (the amount of income which you don’t pay tax on) rose from £11,000 in the last tax year to £11,500. For most people, this will result in an increase in pay of £100 per year.
Above this figure, most income (e.g. salary) is taxed at 20% up to the higher rate tax threshold.
The higher-rate tax threshold rose from £43,000 in tax year 2016/17 to £45,000 with effect from April 6th, 2017.
Above the higher rate tax threshold, most income is taxed at 40% up to £100,000.
For income between £100,000 and £123,000 there is a marginal tax rate of 60% as the personal allowance is gradually withdrawn.
Note that dividend income is taxed differently, and for most people they will also have to pay National Insurance as well as personal tax.