Pay-per-click (PPC) Software Market Size, Share & COVID-19 Impact Analysis, By Type (Search Advertising, Social Media Advertising, Remarketing, Online Shopping, Display Advertising, And Others), By Deployment (Cloud, On-premises), By Enterprise Size (Small & Medium Enterprise (SMEs), Large Enterprises), By End-user (BFSI, Retail & Ecommerce, Automotive, Healthcare, Media and Entertainment, IT & Telecom, And Others), and Regional Forecast, 2020-2027