Regularly checking your tyre pressures is recommended to avoid under inflation and routinely rotating your tyres helps distribute the tyre wearing evenly.
Wheel alignments are highly recommended, especially when you replace any tyres because if your wheels are out of alignment it is going to cause preventable tyre wear. Depending how far out of alignment your wheels are, it could cause minimal/minor tyre wear or if your wheels are way out of alignment it often can cause major tyre wear and serious tyre damage. This is one of the reasons why tyre checks are such an important part of keeping all your tyres well maintained. It is the best way to see if any tyres are wearing when and where they shouldn't and it can be easily identified if a rotation or alignment is needed.