How to set a screen lock on an Android devices

I am a UK-based Technical Architect, Founder & Technology Evangelist. I'm Optimizely MVP & Optimizely SME on Content Cloud and Commerce Cloud. I love working on . NET-based CMS, eCommerce solutions, .NET Core, DevOps, and Cloud computing. I'm also a Certified Optimizely Content Cloud Developer, Certified Optimizely Commerce Cloud developer, Optimizely B2B Commerce developer and Microsoft Certified Professional in Azure application development. I spend my free time with my family and reading books.